Abbassi, Mohamed Tahar Kadaoui; Amri, Noura; Munteanu, Marian Ioan Magnetic trajectories on tangent sphere bundle with g-natural metrics. (English) Zbl 07334030 Ann. Mat. Pura Appl. (4) 200, No. 3, 1033-1054 (2021). MSC: 53B21 53C15 53C25 53C80 PDF BibTeX XML Cite \textit{M. T. K. Abbassi} et al., Ann. Mat. Pura Appl. (4) 200, No. 3, 1033--1054 (2021; Zbl 07334030) Full Text: DOI
Pia, N.; Placini, G. Engel structures on complex surfaces. (English) Zbl 07334028 Ann. Mat. Pura Appl. (4) 200, No. 3, 983-997 (2021). MSC: 53C56 32Q99 53D99 PDF BibTeX XML Cite \textit{N. Pia} and \textit{G. Placini}, Ann. Mat. Pura Appl. (4) 200, No. 3, 983--997 (2021; Zbl 07334028) Full Text: DOI
Calderbank, David M. J.; Kruglikov, Boris Integrability via geometry: dispersionless differential equations in three and four dimensions. (English) Zbl 07333520 Commun. Math. Phys. 382, No. 3, 1811-1841 (2021). MSC: 32L 37K 53C 53B 53C80 32L25 37K25 37K65 53B35 PDF BibTeX XML Cite \textit{D. M. J. Calderbank} and \textit{B. Kruglikov}, Commun. Math. Phys. 382, No. 3, 1811--1841 (2021; Zbl 07333520) Full Text: DOI
Das, Apurba Contact Courant algebroids and \(L_\infty\)-algebras. (English) Zbl 07333259 J. Geom. Phys. 163, Article ID 104127, 18 p. (2021). MSC: 53C15 53D10 53D35 PDF BibTeX XML Cite \textit{A. Das}, J. Geom. Phys. 163, Article ID 104127, 18 p. (2021; Zbl 07333259) Full Text: DOI
Boucetta, Mohamed; Wadia Mansouri, Mohammed Left invariant generalized complex and Kähler structures on simply connected four dimensional Lie groups: classification and invariant cohomologies. (English) Zbl 07332167 J. Algebra 576, 27-94 (2021). MSC: 53D18 22E25 17B30 PDF BibTeX XML Cite \textit{M. Boucetta} and \textit{M. Wadia Mansouri}, J. Algebra 576, 27--94 (2021; Zbl 07332167) Full Text: DOI
Song, Bailin The global sections of chiral de Rham complexes on compact Ricci-flat Kähler manifolds. (English) Zbl 07331846 Commun. Math. Phys. 382, No. 1, 351-379 (2021). MSC: 81R15 46M20 55N30 32S35 14F40 14J33 17B69 14J32 58A12 17B81 PDF BibTeX XML Cite \textit{B. Song}, Commun. Math. Phys. 382, No. 1, 351--379 (2021; Zbl 07331846) Full Text: DOI
Graf, Patrick; Schwald, Martin The Kodaira problem for Kähler spaces with vanishing first Chern class. (English) Zbl 07329821 Forum Math. Sigma 9, Paper No. e24, 15 p. (2021). MSC: 32J27 32G05 PDF BibTeX XML Cite \textit{P. Graf} and \textit{M. Schwald}, Forum Math. Sigma 9, Paper No. e24, 15 p. (2021; Zbl 07329821) Full Text: DOI
Ho, Pak Tung; Shin, Jinwoo Chern-Yamabe problem and Chern-Yamabe soliton. (English) Zbl 07329522 Int. J. Math. 32, No. 3, Article ID 2150016, 22 p. (2021). MSC: 53A30 53B35 53C56 53C44 35R01 PDF BibTeX XML Cite \textit{P. T. Ho} and \textit{J. Shin}, Int. J. Math. 32, No. 3, Article ID 2150016, 22 p. (2021; Zbl 07329522) Full Text: DOI
Milivojević, Aleksandar On the realization of symplectic algebras and rational homotopy types by closed symplectic manifolds. (English) Zbl 07329508 Proc. Am. Math. Soc. 149, No. 5, 2257-2263 (2021). MSC: 55P62 53C15 PDF BibTeX XML Cite \textit{A. Milivojević}, Proc. Am. Math. Soc. 149, No. 5, 2257--2263 (2021; Zbl 07329508) Full Text: DOI
Zhong, Guolei Totally invariant divisors of int-amplified endomorphisms of normal projective varieties. (English) Zbl 07328213 J. Geom. Anal. 31, No. 3, 2568-2593 (2021). MSC: 14E30 32H50 08A35 PDF BibTeX XML Cite \textit{G. Zhong}, J. Geom. Anal. 31, No. 3, 2568--2593 (2021; Zbl 07328213) Full Text: DOI
Calderbank, David M. J.; Slovák, Jan; Souček, Vladimír Subriemannian metrics and the metrizability of parabolic geometries. (English) Zbl 07328177 J. Geom. Anal. 31, No. 2, 1671-1702 (2021). MSC: 53B15 53C17 14M15 17B10 22E46 53C15 53C30 58A32 58J70 93C10 PDF BibTeX XML Cite \textit{D. M. J. Calderbank} et al., J. Geom. Anal. 31, No. 2, 1671--1702 (2021; Zbl 07328177) Full Text: DOI
Gentili, Graziano; Gori, Anna; Sarfatti, Giulia On compact affine quaternionic curves and surfaces. (English) Zbl 07327675 J. Geom. Anal. 31, No. 1, 1073-1092 (2021). MSC: 30G35 53C15 PDF BibTeX XML Cite \textit{G. Gentili} et al., J. Geom. Anal. 31, No. 1, 1073--1092 (2021; Zbl 07327675) Full Text: DOI
Ceccon, Jurandir; Durán, Carlos; Montenegro, Marcos Optimal normed Sobolev type inequalities on manifolds. I: The Nash prototype. (English) Zbl 07327671 J. Geom. Anal. 31, No. 1, 913-952 (2021). MSC: 47J05 46E35 53C15 PDF BibTeX XML Cite \textit{J. Ceccon} et al., J. Geom. Anal. 31, No. 1, 913--952 (2021; Zbl 07327671) Full Text: DOI
Ho, Pak Tung Results related to the Chern-Yamabe flow. (English) Zbl 07327643 J. Geom. Anal. 31, No. 1, 187-220 (2021). MSC: 53A30 53B35 53C44 35R01 53C56 PDF BibTeX XML Cite \textit{P. T. Ho}, J. Geom. Anal. 31, No. 1, 187--220 (2021; Zbl 07327643) Full Text: DOI
Pediconi, Francesco; Pujia, Mattia Hermitian curvature flow on complex locally homogeneous surfaces. (English) Zbl 07326842 Ann. Mat. Pura Appl. (4) 200, No. 2, 815-844 (2021). MSC: 53C44 53C15 53C30 53C55 PDF BibTeX XML Cite \textit{F. Pediconi} and \textit{M. Pujia}, Ann. Mat. Pura Appl. (4) 200, No. 2, 815--844 (2021; Zbl 07326842) Full Text: DOI
Sepulcre, J. M.; Vidal, T. A new geometrical perspective on Bohr-equivalence of exponential polynomials. (English) Zbl 07319379 Anal. Math. Phys. 11, No. 2, Paper No. 55, 20 p. (2021). MSC: 30D20 30Axx 51Pxx 51Lxx PDF BibTeX XML Cite \textit{J. M. Sepulcre} and \textit{T. Vidal}, Anal. Math. Phys. 11, No. 2, Paper No. 55, 20 p. (2021; Zbl 07319379) Full Text: DOI
Fernández, Marisa; Fino, Anna; Kovalev, Alexei; Muñoz, Vicente A compact \(\mathrm G_2\)-calibrated manifold with first Betti number \(b_1 = 1\). (English) Zbl 07319252 Adv. Math. 381, Article ID 107623, 38 p. (2021). MSC: 53C38 53C15 17B30 22E25 PDF BibTeX XML Cite \textit{M. Fernández} et al., Adv. Math. 381, Article ID 107623, 38 p. (2021; Zbl 07319252) Full Text: DOI
Tanaka, Kohei Simple homotopy theory and nerve theorem for categories. (English) Zbl 07318664 Topology Appl. 291, Article ID 107609, 24 p. (2021). Reviewer: Ran Levi (Aberdeen) MSC: 05E18 05E45 57Q10 PDF BibTeX XML Cite \textit{K. Tanaka}, Topology Appl. 291, Article ID 107609, 24 p. (2021; Zbl 07318664) Full Text: DOI
Perktaş, Selcen Yüksel; Blaga, Adara M.; Kılıç, Erol Almost bi-slant submanifolds of an almost contact metric manifold. (English) Zbl 07317353 J. Geom. 112, No. 1, Paper No. 2, 23 p. (2021). MSC: 53C15 53C25 53B25 PDF BibTeX XML Cite \textit{S. Y. Perktaş} et al., J. Geom. 112, No. 1, Paper No. 2, 23 p. (2021; Zbl 07317353) Full Text: DOI
Ghaffarzadeh, Narges; Faghfouri, Morteza On contact pseudo-metric manifolds satisfying a nullity condition. (English) Zbl 07317180 J. Math. Anal. Appl. 497, No. 1, Article ID 124849, 17 p. (2021). MSC: 53D10 53C15 PDF BibTeX XML Cite \textit{N. Ghaffarzadeh} and \textit{M. Faghfouri}, J. Math. Anal. Appl. 497, No. 1, Article ID 124849, 17 p. (2021; Zbl 07317180) Full Text: DOI
Bazzoni, Giovanni; Freibert, Marco; Latorre, Adela; Meinke, Benedict Complex symplectic structures on Lie algebras. (English) Zbl 07317114 J. Pure Appl. Algebra 225, No. 6, Article ID 106585, 29 p. (2021). MSC: 53C30 53C56 53D05 22E25 PDF BibTeX XML Cite \textit{G. Bazzoni} et al., J. Pure Appl. Algebra 225, No. 6, Article ID 106585, 29 p. (2021; Zbl 07317114) Full Text: DOI
Kalafat, Mustafa; Sarı, Ramazan On special submanifolds of the Page space. (English) Zbl 07315196 Differ. Geom. Appl. 74, Article ID 101708, 14 p. (2021). MSC: 53C15 53C40 53C55 PDF BibTeX XML Cite \textit{M. Kalafat} and \textit{R. Sarı}, Differ. Geom. Appl. 74, Article ID 101708, 14 p. (2021; Zbl 07315196) Full Text: DOI
Alishahi, Meysam; Meunier, Frédéric Topological bounds for graph representations over any field. (English) Zbl 07310602 SIAM J. Discrete Math. 35, No. 1, 91-104 (2021). MSC: 05C62 05B35 52B40 PDF BibTeX XML Cite \textit{M. Alishahi} and \textit{F. Meunier}, SIAM J. Discrete Math. 35, No. 1, 91--104 (2021; Zbl 07310602) Full Text: DOI
Bazdar, Arash; Teleman, Andrei Infinitesimal homogeneity and bundles. (English) Zbl 07310546 Ann. Global Anal. Geom. 59, No. 2, 197-231 (2021). MSC: 53C05 53C15 53C30 53C35 PDF BibTeX XML Cite \textit{A. Bazdar} and \textit{A. Teleman}, Ann. Global Anal. Geom. 59, No. 2, 197--231 (2021; Zbl 07310546) Full Text: DOI
Deré, Jonas Orthogonal bi-invariant complex structures on metric Lie algebras. (English) Zbl 07310544 Ann. Global Anal. Geom. 59, No. 2, 157-177 (2021). MSC: 53C15 53C30 17B30 PDF BibTeX XML Cite \textit{J. Deré}, Ann. Global Anal. Geom. 59, No. 2, 157--177 (2021; Zbl 07310544) Full Text: DOI
Jones, Gareth; Schmidt, Harry Pfaffian definitions of Weierstrass elliptic functions. (English) Zbl 07307527 Math. Ann. 379, No. 1-2, 825-864 (2021). Reviewer: Fujita Masato (Kure) MSC: 14P10 30E05 11F03 03C64 PDF BibTeX XML Cite \textit{G. Jones} and \textit{H. Schmidt}, Math. Ann. 379, No. 1--2, 825--864 (2021; Zbl 07307527) Full Text: DOI
Latorre, Adela; Ugarte, Luis On the stability of compact pseudo-Kähler and neutral Calabi-Yau manifolds. (English. French summary) Zbl 07305905 J. Math. Pures Appl. (9) 145, 240-262 (2021). MSC: 53C50 32G05 32Q25 53C15 53C55 53C30 PDF BibTeX XML Cite \textit{A. Latorre} and \textit{L. Ugarte}, J. Math. Pures Appl. (9) 145, 240--262 (2021; Zbl 07305905) Full Text: DOI
Uddin, Siraj; Lone, Mohamd Saleem; Lone, Mehraj Ahmad Chen’s \(\delta\)-invariants type inequalities for bi-slant submanifolds in generalized Sasakian space forms. (English) Zbl 07303900 J. Geom. Phys. 161, Article ID 104040, 9 p. (2021). MSC: 53C40 53B25 53C15 53C25 PDF BibTeX XML Cite \textit{S. Uddin} et al., J. Geom. Phys. 161, Article ID 104040, 9 p. (2021; Zbl 07303900) Full Text: DOI
Chen, Junwen; Zhang, Xiao Metrics of Eguchi-Hanson types with the negative constant scalar curvature. (English) Zbl 07303891 J. Geom. Phys. 161, Article ID 104010, 11 p. (2021). MSC: 53C20 53C55 53C15 PDF BibTeX XML Cite \textit{J. Chen} and \textit{X. Zhang}, J. Geom. Phys. 161, Article ID 104010, 11 p. (2021; Zbl 07303891) Full Text: DOI
Florentino, Carlos; Nozad, Azizeh; Zamora, Alfonso Serre polynomials of \(SL_n\)- and \(PGL_n\)-character varieties of free groups. (English) Zbl 07303890 J. Geom. Phys. 161, Article ID 104008, 22 p. (2021). MSC: 14L30 32S35 14D20 PDF BibTeX XML Cite \textit{C. Florentino} et al., J. Geom. Phys. 161, Article ID 104008, 22 p. (2021; Zbl 07303890) Full Text: DOI
Fairon, M.; Fehér, L.; Marshall, I. Trigonometric real form of the spin RS model of Krichever and Zabrodin. (English) Zbl 07303666 Ann. Henri Poincaré 22, No. 2, 615-675 (2021). MSC: 37J35 37J39 37J37 37J38 70H06 53D17 53D20 PDF BibTeX XML Cite \textit{M. Fairon} et al., Ann. Henri Poincaré 22, No. 2, 615--675 (2021; Zbl 07303666) Full Text: DOI
Doubrov, Boris; Medvedev, Alexandr; The, Dennis Homogeneous Levi non-degenerate hypersurfaces in \(\mathbb{C}^3\). (English) Zbl 07303589 Math. Z. 297, No. 1-2, 669-709 (2021). MSC: 32V40 32V05 58J70 53A15 32V40 32-02 32V10 32V25 PDF BibTeX XML Cite \textit{B. Doubrov} et al., Math. Z. 297, No. 1--2, 669--709 (2021; Zbl 07303589) Full Text: DOI
Alexandrov, Alexander KP integrability of triple Hodge integrals. II: Generalized Kontsevich matrix model. (English) Zbl 07301486 Anal. Math. Phys. 11, No. 1, Paper No. 24, 82 p. (2021). Reviewer: Ivan C. Sterling (St. Mary’s City) MSC: 37K20 37K10 37K30 14N35 81R10 14N10 81T32 PDF BibTeX XML Cite \textit{A. Alexandrov}, Anal. Math. Phys. 11, No. 1, Paper No. 24, 82 p. (2021; Zbl 07301486) Full Text: DOI
Doan, Aleksander; Walpuski, Thomas Castelnuovo’s bound and rigidity in almost complex geometry. (English) Zbl 07300460 Adv. Math. 379, Article ID 107550, 24 p. (2021). Reviewer: Nicolai K. Smolentsev (Kemerovo) MSC: 53C15 53C24 14J32 32Q65 PDF BibTeX XML Cite \textit{A. Doan} and \textit{T. Walpuski}, Adv. Math. 379, Article ID 107550, 24 p. (2021; Zbl 07300460) Full Text: DOI
Eyasmin, Sabina; Chakraborty, Dhyanesh Curvature properties of \((t-z)\)-type plane wave metric. (English) Zbl 07299635 J. Geom. Phys. 160, Article ID 104004, 11 p. (2021). MSC: 53B30 53B50 53C15 53C25 83C15 PDF BibTeX XML Cite \textit{S. Eyasmin} and \textit{D. Chakraborty}, J. Geom. Phys. 160, Article ID 104004, 11 p. (2021; Zbl 07299635) Full Text: DOI
Djurdjević, Nataša Some classes of CR submanifolds with an umbilical section of the nearly Kähler \(\mathbb{S}^3\times\mathbb{S}^3\). (English) Zbl 07299634 J. Geom. Phys. 160, Article ID 104002, 14 p. (2021). MSC: 53B35 53C15 32V30 53C42 PDF BibTeX XML Cite \textit{N. Djurdjević}, J. Geom. Phys. 160, Article ID 104002, 14 p. (2021; Zbl 07299634) Full Text: DOI
Chrysikos, Ioannis; Sakane, Yusuke Homogeneous Einstein metrics on non-Kähler C-spaces. (English) Zbl 07299630 J. Geom. Phys. 160, Article ID 103996, 32 p. (2021). MSC: 53C25 53C30 53C15 PDF BibTeX XML Cite \textit{I. Chrysikos} and \textit{Y. Sakane}, J. Geom. Phys. 160, Article ID 103996, 32 p. (2021; Zbl 07299630) Full Text: DOI
Davidov, Johann; Shakoor, Kamran Almost Hermitian structures defining harmonic maps of the unit tangent bundle. (English) Zbl 07299627 J. Geom. Phys. 160, Article ID 103988, 15 p. (2021). MSC: 53C43 58E20 PDF BibTeX XML Cite \textit{J. Davidov} and \textit{K. Shakoor}, J. Geom. Phys. 160, Article ID 103988, 15 p. (2021; Zbl 07299627) Full Text: DOI
Shaikh, Absos Ali; Chakraborty, Dhyanesh Curvature properties of Kantowski-Sachs metric. (English) Zbl 07299621 J. Geom. Phys. 160, Article ID 103970, 14 p. (2021). MSC: 53B30 53B50 53C15 83C15 PDF BibTeX XML Cite \textit{A. A. Shaikh} and \textit{D. Chakraborty}, J. Geom. Phys. 160, Article ID 103970, 14 p. (2021; Zbl 07299621) Full Text: DOI
Djorić, Miloš; Djorić, Mirjana; Moruz, Marilena Real hypersurfaces of the homogeneous nearly Kähler \(\mathbb{S}^3\times\mathbb{S}^3\) with \(\mathcal{P}\)-isotropic normal. (English) Zbl 07299615 J. Geom. Phys. 160, Article ID 103945, 14 p. (2021). MSC: 53B25 53C15 PDF BibTeX XML Cite \textit{M. Djorić} et al., J. Geom. Phys. 160, Article ID 103945, 14 p. (2021; Zbl 07299615) Full Text: DOI
Chudecki, Adam Two-sided conformally recurrent self-dual spaces. (English) Zbl 07299386 J. Geom. Phys. 159, Article ID 103933, 17 p. (2021). MSC: 53C56 53C27 83C60 53C15 53C12 PDF BibTeX XML Cite \textit{A. Chudecki}, J. Geom. Phys. 159, Article ID 103933, 17 p. (2021; Zbl 07299386) Full Text: DOI
Wang, Yaning Almost Kenmotsu \((k,\mu)'\)-manifolds with Yamabe solitons. (English) Zbl 07299284 Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat., RACSAM 115, No. 1, Paper No. 14, 7 p. (2021). MSC: 53C15 53C25 PDF BibTeX XML Cite \textit{Y. Wang}, Rev. R. Acad. Cienc. Exactas Fís. Nat., Ser. A Mat., RACSAM 115, No. 1, Paper No. 14, 7 p. (2021; Zbl 07299284) Full Text: DOI
Kitada, Yasuhiko; Nagura, Maki The first Pontrjagin classes of homotopy complex projective spaces. (English) Zbl 07297244 Topology Appl. 287, Article ID 107447, 19 p. (2021). MSC: 57R20 57R55 57R67 PDF BibTeX XML Cite \textit{Y. Kitada} and \textit{M. Nagura}, Topology Appl. 287, Article ID 107447, 19 p. (2021; Zbl 07297244) Full Text: DOI
Li, Chang; Zheng, Tao The continuity equation of almost Hermitian metrics. (English) Zbl 07289123 J. Differ. Equations 274, 1015-1036 (2021). MSC: 32Q60 32W20 35K96 53C15 PDF BibTeX XML Cite \textit{C. Li} and \textit{T. Zheng}, J. Differ. Equations 274, 1015--1036 (2021; Zbl 07289123) Full Text: DOI
Ballico, Edoardo; Gasparim, Elizabeth; Suzuki, Bruno Infinite dimensional families of Calabi-Yau threefolds and moduli of vector bundles. (English) Zbl 1453.32017 J. Pure Appl. Algebra 225, No. 4, Article ID 106554, 24 p. (2021). MSC: 32G05 32G08 32Q25 PDF BibTeX XML Cite \textit{E. Ballico} et al., J. Pure Appl. Algebra 225, No. 4, Article ID 106554, 24 p. (2021; Zbl 1453.32017) Full Text: DOI
Manev, Hristo Matrix Lie groups as 4-dimensional hypercomplex manifolds with Hermitian-Norden metrics. (English) Zbl 07332261 J. Lie Theory 30, No. 3, 617-626 (2020). MSC: 22E60 22E15 53C15 53C50 22E30 53C55 PDF BibTeX XML Cite \textit{H. Manev}, J. Lie Theory 30, No. 3, 617--626 (2020; Zbl 07332261) Full Text: Link
Joswig, Michael; Löwe, Robert; Springborn, Boris Secondary fans and secondary polyhedra of punctured Riemann surfaces. (English) Zbl 07330981 Exp. Math. 29, No. 4, 426-442 (2020). MSC: 30F60 32G15 52B12 57M50 PDF BibTeX XML Cite \textit{M. Joswig} et al., Exp. Math. 29, No. 4, 426--442 (2020; Zbl 07330981) Full Text: DOI
Marini, Stefano; Medori, Costantino; Nacinovich, Mauro; Spiro, Andrea On transitive contact and \(CR\) algebras. (English) Zbl 07328848 Ann. Sc. Norm. Super. Pisa, Cl. Sci. (5) 20, No. 2, 771-795 (2020). MSC: 32V35 32V05 32M10 17B65 53D10 53C30 PDF BibTeX XML Cite \textit{S. Marini} et al., Ann. Sc. Norm. Super. Pisa, Cl. Sci. (5) 20, No. 2, 771--795 (2020; Zbl 07328848) Full Text: DOI
Bedulli, Lucio; Vezzoni, Luigi A scalar Calabi-type flow in Hermitian geometry: short-time existence and stability. (English) Zbl 07328844 Ann. Sc. Norm. Super. Pisa, Cl. Sci. (5) 20, No. 2, 657-676 (2020). MSC: 53E30 53C55 35K55 53C10 PDF BibTeX XML Cite \textit{L. Bedulli} and \textit{L. Vezzoni}, Ann. Sc. Norm. Super. Pisa, Cl. Sci. (5) 20, No. 2, 657--676 (2020; Zbl 07328844) Full Text: DOI
Kawamura, Masaya On 6-dimensional Kähler-like or G-Kähler-like nearly Kähler manifolds. (English) Zbl 07328082 N. Z. J. Math. 50, 219-231 (2020). MSC: 32Q60 32Q15 53C15 53C55 PDF BibTeX XML Cite \textit{M. Kawamura}, N. Z. J. Math. 50, 219--231 (2020; Zbl 07328082) Full Text: Link
Catanese, Fabrizio Cyclic symmetry on complex tori and Bagnera-De Franchis manifolds. (English) Zbl 07326259 Neumann, Frank (ed.) et al., Galois covers, Grothendieck-Teichmüller theory and dessins d’enfants. Interactions between geometry, topology, number theory and algebra. Proceedings from the London Mathematical Society Midlands regional meeting and workshop, Leicester, UK, June 4–7, 2018. Cham: Springer (ISBN 978-3-030-51794-6/hbk; 978-3-030-51795-3/ebook). Springer Proceedings in Mathematics & Statistics 330, 31-54 (2020). MSC: 32Q15 32M17 32Q57 14K99 14D99 11A07 11R18 13C05 PDF BibTeX XML Cite \textit{F. Catanese}, in: Galois covers, Grothendieck-Teichmüller theory and dessins d'enfants. Interactions between geometry, topology, number theory and algebra. Proceedings from the London Mathematical Society Midlands regional meeting and workshop, Leicester, UK, June 4--7, 2018. Cham: Springer. 31--54 (2020; Zbl 07326259) Full Text: DOI
Yoldaş, Halil Ibrahim On a classification of super quasi-Einstein manifolds. (English) Zbl 07324107 Balan, Vladimir (ed.) et al., Proceedings of the international conference on differential geometry and dynamical systems (DGDS-2019), Bucharest, Romania, October 10–13, 2019. In memoriam of Vasile Oproiu and Aurel Bejancu. Bucharest: Geometry Balkan Press. BSG Proceedings 26, 107-115 (2020). MSC: 53C15 53C25 53B20 58A50 PDF BibTeX XML Cite \textit{H. I. Yoldaş}, BSG Proc. 26, 107--115 (2020; Zbl 07324107) Full Text: Link
Khan, Meraj Ali; Alkhalidi, Ali H. Chen’s inequalities for biwarped product submanifolds in complex space forms. (English) Zbl 07324105 Balan, Vladimir (ed.) et al., Proceedings of the international conference on differential geometry and dynamical systems (DGDS-2019), Bucharest, Romania, October 10–13, 2019. In memoriam of Vasile Oproiu and Aurel Bejancu. Bucharest: Geometry Balkan Press. BSG Proceedings 26, 69-79 (2020). MSC: 53C40 53C42 53C15 PDF BibTeX XML Cite \textit{M. A. Khan} and \textit{A. H. Alkhalidi}, BSG Proc. 26, 69--79 (2020; Zbl 07324105) Full Text: Link
Alghamdi, Mohammed Ali; Bahadir, Oguzhan Some characterizations in Kenmotsu manifolds with a new connection. (English) Zbl 07324100 Balan, Vladimir (ed.) et al., Proceedings of the international conference on differential geometry and dynamical systems (DGDS-2019), Bucharest, Romania, October 10–13, 2019. In memoriam of Vasile Oproiu and Aurel Bejancu. Bucharest: Geometry Balkan Press. BSG Proceedings 26, 1-16 (2020). MSC: 53C15 53C25 53C40 PDF BibTeX XML Cite \textit{M. A. Alghamdi} and \textit{O. Bahadir}, BSG Proc. 26, 1--16 (2020; Zbl 07324100) Full Text: Link
Lahdili, Abdellah Conformally Kähler, Einstein-Maxwell metrics and boundedness of the modified Mabuchi functional. (English) Zbl 07323392 Int. Math. Res. Not. 2020, No. 22, 8418-8442 (2020). MSC: 53C55 32Q15 53C18 PDF BibTeX XML Cite \textit{A. Lahdili}, Int. Math. Res. Not. 2020, No. 22, 8418--8442 (2020; Zbl 07323392) Full Text: DOI
García-Prada, Oscar; Salamon, Dietmar A.; Trautwein, Samuel Complex structures, moment maps, and the Ricci form. (English) Zbl 07323119 Asian J. Math. 24, No. 5, 821-854 (2020). MSC: 32Q60 53D20 53D35 53C15 14J10 PDF BibTeX XML Cite \textit{O. García-Prada} et al., Asian J. Math. 24, No. 5, 821--854 (2020; Zbl 07323119) Full Text: DOI
Muñoz, Vicente; Rojo, Juan Angel; Tralle, Aleksy Homology Smale-Barden manifolds with \(K\)-contact but not Sasakian structures. (English) Zbl 07319820 Int. Math. Res. Not. 2020, No. 21, 7397-7432 (2020). Reviewer: Andrew Bucki (Edmond) MSC: 57R17 53D35 53C15 PDF BibTeX XML Cite \textit{V. Muñoz} et al., Int. Math. Res. Not. 2020, No. 21, 7397--7432 (2020; Zbl 07319820) Full Text: DOI
Calvo-Andrade, Omegar; Díaz, Lázaro O. Rodríguez; Earp, Henrique N. Sá Gauge theory and \(\mathrm{G}_2\)-geometry on Calabi-Yau links. (English) Zbl 07318500 Rev. Mat. Iberoam. 36, No. 6, 1753-1778 (2020). MSC: 53C07 53C25 57R15 32S55 57R18 32Q25 PDF BibTeX XML Cite \textit{O. Calvo-Andrade} et al., Rev. Mat. Iberoam. 36, No. 6, 1753--1778 (2020; Zbl 07318500) Full Text: DOI
Méndez, Mayra Complex orthogonal geometric structures of dimension three. (English) Zbl 07318499 Rev. Mat. Iberoam. 36, No. 6, 1721-1752 (2020). MSC: 53C15 53C56 30F40 PDF BibTeX XML Cite \textit{M. Méndez}, Rev. Mat. Iberoam. 36, No. 6, 1721--1752 (2020; Zbl 07318499) Full Text: DOI
Sukhov, Alexandre The Chirka-Lindelöf and Fatou theorems for \(\overline{\partial}_J\)-subsolutions. (English) Zbl 07318490 Rev. Mat. Iberoam. 36, No. 5, 1469-1487 (2020). MSC: 32H02 53C15 PDF BibTeX XML Cite \textit{A. Sukhov}, Rev. Mat. Iberoam. 36, No. 5, 1469--1487 (2020; Zbl 07318490) Full Text: DOI
Kawamura, Masaya Regularity results for the almost Hermitian curvature flow. (English) Zbl 07318468 Tsukuba J. Math. 44, No. 1, 63-120 (2020). MSC: 53E30 53C15 53C55 PDF BibTeX XML Cite \textit{M. Kawamura}, Tsukuba J. Math. 44, No. 1, 63--120 (2020; Zbl 07318468) Full Text: DOI Euclid
Shanmukha, B.; Venkatesha, V. Some Ricci solitons on Kenmotsu manifold. (English) Zbl 07317705 J. Anal. 28, No. 4, 1155-1164 (2020). MSC: 53C25 53E20 53C15 PDF BibTeX XML Cite \textit{B. Shanmukha} and \textit{V. Venkatesha}, J. Anal. 28, No. 4, 1155--1164 (2020; Zbl 07317705) Full Text: DOI
Aryanejad, Yadollah Harmonicity of left-invariant vector fields on Einstein Lorentzian Lie groups. (English) Zbl 1455.53086 Iran. J. Math. Sci. Inform. 15, No. 1, 65-78 (2020). MSC: 53C50 53C15 53C25 PDF BibTeX XML Cite \textit{Y. Aryanejad}, Iran. J. Math. Sci. Inform. 15, No. 1, 65--78 (2020; Zbl 1455.53086) Full Text: Link
Kawamura, Masaya On Kähler-like almost Hermitian metrics and the almost Hermitian curvature flow. (English) Zbl 07317357 Hokkaido Math. J. 49, No. 3, 431-450 (2020). MSC: 32Q60 53C15 53C55 PDF BibTeX XML Cite \textit{M. Kawamura}, Hokkaido Math. J. 49, No. 3, 431--450 (2020; Zbl 07317357) Full Text: DOI Euclid
Goldman, William M. Parallelism on Lie groups and Fox’s free differential calculus. (English) Zbl 07316045 Collin, Olivier (ed.) et al., Characters in low-dimensional topology. A conference celebrating the work of Steven Boyer, Université du Québec à Montréal, Montréal, Québec, Canada, June 2–6, 2018. Providence, RI: American Mathematical Society (AMS); Montreal: Centre de Recherches Mathématiques (CRM) (ISBN 978-1-4704-5209-4/pbk; 978-1-4704-6135-5/ebook). Contemporary Mathematics 760. Centre de Recherches Mathématiques Proceedings, 157-166 (2020). MSC: 22E15 22E40 53C15 57M50 PDF BibTeX XML Cite \textit{W. M. Goldman}, Contemp. Math. 760, 157--166 (2020; Zbl 07316045) Full Text: DOI
Van der Veken, Joeri; Carriazo, Alfonso; Dimitrić, Ivko; Oh, Yun Myung; Suceavă, Bogdan D.; Vrancken, Luc Reflections on some research work of Bang-Yen Chen. (English) Zbl 07315973 Van der Veken, Joeri (ed.) et al., Geometry of submanifolds. AMS special session in honor of Bang-Yen Chen’s 75th birthday, University of Michigan, Ann Arbor, Michigan, October 20–21, 2018. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-5092-2/pbk; 978-1-4704-5666-5/ebook). Contemporary Mathematics 756, 1-12 (2020). MSC: 53-03 53B20 53B25 53A15 53A31 53A55 53B35 53C15 53C25 53C35 53C40 53C42 53C43 53C55 53C80 53C99 91B99 PDF BibTeX XML Cite \textit{J. Van der Veken} et al., Contemp. Math. 756, 1--12 (2020; Zbl 07315973) Full Text: DOI
Acharya, Bobby Samir; Bryant, Robert L.; Salamon, Simon A circle quotient of a \(G_2\) cone. (English) Zbl 07315174 Differ. Geom. Appl. 73, Article ID 101681, 43 p. (2020). Reviewer: Mihail Banaru (Smolensk) MSC: 53C29 53C10 53C15 53C20 PDF BibTeX XML Cite \textit{B. S. Acharya} et al., Differ. Geom. Appl. 73, Article ID 101681, 43 p. (2020; Zbl 07315174) Full Text: DOI
Zhang, Jun; Khan, Gabriel Statistical mirror symmetry. (English) Zbl 07315171 Differ. Geom. Appl. 73, Article ID 101678, 32 p. (2020). MSC: 53B12 53B35 53C15 PDF BibTeX XML Cite \textit{J. Zhang} and \textit{G. Khan}, Differ. Geom. Appl. 73, Article ID 101678, 32 p. (2020; Zbl 07315171) Full Text: DOI
Aryanejad, Yadollah Some geometrical properties of the oscillator group. (English) Zbl 07314448 Casp. J. Math. Sci. 9, No. 2, 284-293 (2020). MSC: 53C50 53C15 53C25 PDF BibTeX XML Cite \textit{Y. Aryanejad}, Casp. J. Math. Sci. 9, No. 2, 284--293 (2020; Zbl 07314448) Full Text: DOI
Shaqaqha, Shadi Complex fuzzy Lie algebras. (English) Zbl 07314233 Jordan J. Math. Stat. 13, No. 2, 231-247 (2020). MSC: 08A72 03E72 20N25 PDF BibTeX XML Cite \textit{S. Shaqaqha}, Jordan J. Math. Stat. 13, No. 2, 231--247 (2020; Zbl 07314233) Full Text: Link
Manjulamma, Uppara; Nagaraja, H. G.; Kiran Kumar, D. L. Generalized complex space forms. (English) Zbl 07314231 Jordan J. Math. Stat. 13, No. 2, 203-219 (2020). MSC: 53C15 53C25 53C40 PDF BibTeX XML Cite \textit{U. Manjulamma} et al., Jordan J. Math. Stat. 13, No. 2, 203--219 (2020; Zbl 07314231) Full Text: Link
Biswas, Ashis; Das, Ashoke; Baishya, Kanak Kanti; Bakshi, Manoj Ray \(\eta\)-Ricci solitons on Kenmotsu manifolds admitting general connection. (English) Zbl 07312281 Korean J. Math. 28, No. 4, 803-817 (2020). MSC: 53C15 53C25 PDF BibTeX XML Cite \textit{A. Biswas} et al., Korean J. Math. 28, No. 4, 803--817 (2020; Zbl 07312281) Full Text: DOI
De, Krishnendu; De, Uday Chand A note on almost Ricci soliton and gradient almost Ricci soliton on para-Sasakian manifolds. (English) Zbl 07312277 Korean J. Math. 28, No. 4, 739-751 (2020). MSC: 53C21 53C15 53C50 PDF BibTeX XML Cite \textit{K. De} and \textit{U. C. De}, Korean J. Math. 28, No. 4, 739--751 (2020; Zbl 07312277) Full Text: DOI
At\dceken, Mehmet; Uygun, Pakize Characterizations for totally geodesic submanifolds of \((\kappa,\mu)\)-paracontact metric manifolds. (English) Zbl 07312266 Korean J. Math. 28, No. 3, 555-571 (2020). MSC: 53B25 53C15 53D10 PDF BibTeX XML Cite \textit{M. At\d{c}eken} and \textit{P. Uygun}, Korean J. Math. 28, No. 3, 555--571 (2020; Zbl 07312266) Full Text: DOI
Singh, Jay Prakash; Lalnunsiami, Kingbawl Certain curvature properties of \(N(k)\)-quasi Einstein manifolds. (English) Zbl 07311580 SUT J. Math. 56, No. 1, 55-69 (2020). MSC: 53C25 53C15 PDF BibTeX XML Cite \textit{J. P. Singh} and \textit{K. Lalnunsiami}, SUT J. Math. 56, No. 1, 55--69 (2020; Zbl 07311580)
Peters, James F. Ribbon complexes with approximate descriptive proximities. Ribbon & Vortex nerves, Betti numbers and planar divisions. (English) Zbl 07311561 Bull. Allahabad Math. Soc. 35, No. 1, 31-53 (2020). Reviewer: Dieter Leseberg (Berlin) MSC: 54E05 55R40 68U05 54H30 55P15 PDF BibTeX XML Cite \textit{J. F. Peters}, Bull. Allahabad Math. Soc. 35, No. 1, 31--53 (2020; Zbl 07311561)
Lee, C. W.; Lee, J. W. Generic lightlike submanifolds of an indefinite Kaehler manifold with an \((\ell, m)\)-type metric connection. (English) Zbl 07310565 Armen. J. Math. 12, Paper No. 6, 17 p. (2020). MSC: 53B25 53B35 53B30 PDF BibTeX XML Cite \textit{C. W. Lee} and \textit{J. W. Lee}, Armen. J. Math. 12, Paper No. 6, 17 p. (2020; Zbl 07310565) Full Text: Link
Siddiqi, Mohd Danish; Chaubey, Sudhakar K. Almost \(\eta \)-conformal Ricci solitons in \((LCS)_3\)-manifolds. (English) Zbl 07309243 Sarajevo J. Math. 16(29), No. 2, 245-260 (2020). MSC: 53C15 53C20 53C25 PDF BibTeX XML Cite \textit{M. D. Siddiqi} and \textit{S. K. Chaubey}, Sarajevo J. Math. 16(29), No. 2, 245--260 (2020; Zbl 07309243) Full Text: DOI
Aktay, Şirin On the relation between \(G_2^*\) structures and almost paracontact structures. (English) Zbl 07309225 J. Geom. Symmetry Phys. 56, 31-43 (2020). MSC: 53C15 53C25 53D15 PDF BibTeX XML Cite \textit{Ş. Aktay}, J. Geom. Symmetry Phys. 56, 31--43 (2020; Zbl 07309225) Full Text: DOI Euclid
Davidov, Johann; Mushkarov, Oleg Curvature properties of twistor spaces. (English. Russian original) Zbl 07308454 Proc. Steklov Inst. Math. 311, 78-97 (2020); translation from Tr. Mat. Inst. Steklova 311, 84-105 (2020). MSC: 53C28 53C15 PDF BibTeX XML Cite \textit{J. Davidov} and \textit{O. Mushkarov}, Proc. Steklov Inst. Math. 311, 78--97 (2020; Zbl 07308454); translation from Tr. Mat. Inst. Steklova 311, 84--105 (2020) Full Text: DOI
Azami, Shahroud; Fasihi-Ramandi, Ghodratallah Ricci \(\rho\)-solitons on 3-dimensional \(\eta\)-Einstein almost Kenmotsu manifolds. (English) Zbl 07308179 Commun. Korean Math. Soc. 35, No. 2, 613-623 (2020). MSC: 53C25 53C15 53E20 PDF BibTeX XML Cite \textit{S. Azami} and \textit{G. Fasihi-Ramandi}, Commun. Korean Math. Soc. 35, No. 2, 613--623 (2020; Zbl 07308179) Full Text: DOI
Kutluhan, Çağatay; Lee, Yi-Jen; Taubes, Clifford HF=HM. II: Reeb orbits and holomorphic curves for the ech/Heegaard Floer correspondence. (English) Zbl 07305782 Geom. Topol. 24, No. 6, 2855-3012 (2020). MSC: 57R58 57R57 57K31 53C07 53C15 PDF BibTeX XML Cite \textit{Ç. Kutluhan} et al., Geom. Topol. 24, No. 6, 2855--3012 (2020; Zbl 07305782) Full Text: DOI
Kutluhan, Çağatay; Lee, Yi-Jen; Taubes, Clifford HF=HM. I: Heegaard Floer homology and Seiberg-Witten Floer homology. (English) Zbl 07305781 Geom. Topol. 24, No. 6, 2829-2854 (2020). MSC: 57R58 57R57 57K31 53C07 53C15 PDF BibTeX XML Cite \textit{Ç. Kutluhan} et al., Geom. Topol. 24, No. 6, 2829--2854 (2020; Zbl 07305781) Full Text: DOI
Gorbatsevich, V. V. Letter to the editors. (English. Russian original) Zbl 07304910 Izv. Math. 84, No. 6, 1250 (2020); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 84, No. 6, 223 (2020). MSC: 30G35 53C15 57T15 PDF BibTeX XML Full Text: DOI
Jakubczyk, B. Exterior multiplication with singularities: a Saito theorem in vector bundles. (English) Zbl 07304806 Ann. Pol. Math. 125, No. 2, 117-138 (2020). MSC: 58A10 53C15 58A05 PDF BibTeX XML Cite \textit{B. Jakubczyk}, Ann. Pol. Math. 125, No. 2, 117--138 (2020; Zbl 07304806) Full Text: DOI
Habib, Bouzir; Gherici, Beldjilali Kählerian manifold on the product of two trans-Sasakian manifolds. (English) Zbl 07304409 Int. Electron. J. Geom. 13, No. 2, 135-143 (2020). MSC: 53C15 53C40 PDF BibTeX XML Cite \textit{B. Habib} and \textit{B. Gherici}, Int. Electron. J. Geom. 13, No. 2, 135--143 (2020; Zbl 07304409) Full Text: DOI
Bulut, Şenay; Ermiş, Sevgi Enveş Almost contact \(B\)-metric structure on 5-dimensional nilpotent Lie algebras. (English) Zbl 07304405 Int. Electron. J. Geom. 13, No. 2, 87-97 (2020). MSC: 53C05 53C15 53C25 PDF BibTeX XML Cite \textit{Ş. Bulut} and \textit{S. E. Ermiş}, Int. Electron. J. Geom. 13, No. 2, 87--97 (2020; Zbl 07304405) Full Text: DOI
Inoguchi, Jun-Ichi \(J\)-trajectories in locally conformal Kähler manifolds with parallel anti Lee field. (English) Zbl 07304400 Int. Electron. J. Geom. 13, No. 2, 30-44 (2020). MSC: 53C15 53C25 53C30 53C55 53C80 PDF BibTeX XML Cite \textit{J.-I. Inoguchi}, Int. Electron. J. Geom. 13, No. 2, 30--44 (2020; Zbl 07304400) Full Text: DOI
Das, Lovejoy; Çayir, Haşim On the integrability conditions and operators of the \(F((K+1),(K-1))-\) structure satisfying \(F^{K+1}+F^{K-1}=0, (F\neq 0, K\eqslantgtr 2)\) on cotangent bundle and tangent bundle. (English) Zbl 07304395 Int. Electron. J. Geom. 13, No. 1, 94-106 (2020). MSC: 53C15 32V30 53D10 53A45 47B47 PDF BibTeX XML Cite \textit{L. Das} and \textit{H. Çayir}, Int. Electron. J. Geom. 13, No. 1, 94--106 (2020; Zbl 07304395) Full Text: DOI
Beldjilali, Gherici A new class of golden Riemannian manifold. (English) Zbl 07304386 Int. Electron. J. Geom. 13, No. 1, 1-8 (2020). MSC: 53C15 53C25 PDF BibTeX XML Cite \textit{G. Beldjilali}, Int. Electron. J. Geom. 13, No. 1, 1--8 (2020; Zbl 07304386) Full Text: DOI
Faraco, Gianluca Distances on the moduli space of complex projective structures. (English) Zbl 07304248 Expo. Math. 38, No. 4, 407-429 (2020). Reviewer: Subhojoy Gupta (Bangalore) MSC: 30F60 57M50 32Q45 PDF BibTeX XML Cite \textit{G. Faraco}, Expo. Math. 38, No. 4, 407--429 (2020; Zbl 07304248) Full Text: DOI
Bae, Jihong; Jang, Yeongjae; Park, JeongHyeong; Sekigawa, Kouei Quasi contact metric manifolds with Killing characteristic vector fields. (English) Zbl 07304236 Bull. Korean Math. Soc. 57, No. 5, 1299-1306 (2020). MSC: 53C15 53B20 PDF BibTeX XML Cite \textit{J. Bae} et al., Bull. Korean Math. Soc. 57, No. 5, 1299--1306 (2020; Zbl 07304236) Full Text: DOI
Suzuki, Takao; Okubo, Naoto Cluster algebra and \(q\)-Painlevé equations: higher order generalization and degeneration structure. (English) Zbl 07304001 RIMS Kôkyûroku Bessatsu B78, 53-75 (2020). MSC: 39A13 17B80 34M55 37J70 37J65 37J37 13F60 PDF BibTeX XML Cite \textit{T. Suzuki} and \textit{N. Okubo}, RIMS Kôkyûroku Bessatsu B78, 53--75 (2020; Zbl 07304001) Full Text: Link
Choi, Young-Jun; Yum, Jihun Semi-continuity of the Diederich-Fornaess and Steinness indices. (English) Zbl 07301543 Int. J. Math. 31, No. 13, Article ID 2050107, 8 p. (2020). MSC: 32T27 32U10 32G05 PDF BibTeX XML Cite \textit{Y.-J. Choi} and \textit{J. Yum}, Int. J. Math. 31, No. 13, Article ID 2050107, 8 p. (2020; Zbl 07301543) Full Text: DOI
Chang, Shu-Cheng; Dong, Yuxin; Han, Yingbo On the \(p\)-pseudoharmonic map heat flow. (English) Zbl 07301541 Int. J. Math. 31, No. 13, Article ID 2050104, 27 p. (2020). MSC: 32V05 32V20 53C56 PDF BibTeX XML Cite \textit{S.-C. Chang} et al., Int. J. Math. 31, No. 13, Article ID 2050104, 27 p. (2020; Zbl 07301541) Full Text: DOI
Oliveira, Gonçalo Pseudo-holomorphic curves: a very quick overview. (English) Zbl 07299610 Complex Manifolds 7, 215-229 (2020). MSC: 32Q65 53B35 53C15 53C38 53D05 58J60 PDF BibTeX XML Cite \textit{G. Oliveira}, Complex Manifolds 7, 215--229 (2020; Zbl 07299610) Full Text: DOI
Ginoux, Nicolas; Habib, Georges; Pilca, Mihaela; Semmelmann, Uwe An Obata-type characterisation of Calabi metrics on line bundles. (English) Zbl 07297300 North-West. Eur. J. Math. 6, 119-136 (2020). Reviewer: Andreas Arvanitoyeorgos (Patras) MSC: 53C25 53C55 53C35 53C15 PDF BibTeX XML Cite \textit{N. Ginoux} et al., North-West. Eur. J. Math. 6, 119--136 (2020; Zbl 07297300) Full Text: Link
Durmaz, Olgun; Aktas, Busra; Gundogan, Halit On parallelizable spheres in semi Euclidean space. (English) Zbl 07296168 Southeast Asian Bull. Math. 44, No. 3, 325-334 (2020). MSC: 11R52 51A15 PDF BibTeX XML Cite \textit{O. Durmaz} et al., Southeast Asian Bull. Math. 44, No. 3, 325--334 (2020; Zbl 07296168)
Banaru, M. B. On a property of \(W_4\)-manifolds. (Russian. English summary) Zbl 07293276 Differ. Geom. Mnogoobr. Figur 51, 14-21 (2020). Reviewer: Andrew Bucki (Edmond) MSC: 53C25 53C15 53C40 PDF BibTeX XML Cite \textit{M. B. Banaru}, Differ. Geom. Mnogoobr. Figur 51, 14--21 (2020; Zbl 07293276) Full Text: DOI
Banaru, G. A. On six-dimensional AH-submanifolds of class \(W_1 \oplus W_2 \oplus W_4\) in Cayley algebra. (Russian. English summary) Zbl 07293275 Differ. Geom. Mnogoobr. Figur 51, 7-13 (2020). Reviewer: Nicolai K. Smolentsev (Kemerovo) MSC: 53C15 53C55 53C25 PDF BibTeX XML Cite \textit{G. A. Banaru}, Differ. Geom. Mnogoobr. Figur 51, 7--13 (2020; Zbl 07293275) Full Text: DOI