# zbMATH — the first resource for mathematics

## Demonstratio Mathematica

 Short Title: Demonstr. Math. Publisher: De Gruyter, Warsaw; Warsaw University of Technology, Faculty of Mathematics and Information Sciences, Warsaw ISSN: 2391-4661; 0420-1213/e Online: https://www.degruyter.com/view/j/demahttp://demmath.mini.pw.edu.pl/access.phphttp://demmath.mini.pw.edu.pl/issues.html Comments: Indexed cover-to-cover; Published electronic only as of Vol. 47 (2014). This journal is available open access.
 Documents Indexed: 3,756 Publications (since 1969) References Indexed: 485 Publications with 8,690 References.
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#### Latest Issues

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#### Authors

 27 Pachpatte, Baburao Govindrao 25 Dragomir, Sever Silvestru 25 Sasin, Wiesław 23 Mikulski, Włodzimierz M. 23 Popa, Valeriu 22 Tatarkiewicz, Krzysztof 21 Nguyen Thanh Long 19 Noiri, Takashi 18 Prażmowski, Krzysztof 18 Romanowska, Anna B. 17 Chajda, Ivan 17 Herzog, Gerd 17 Przeworska-Rolewicz, Danuta 17 Zekanowski, Zbigniew 15 Dziubinski, Izydor 15 Musiałek, Jan 15 Schmoeger, Christoph 15 Sznitko, Wanda 15 Witczyński, Krzysztof 14 Aouf, Mohamed Kamal 14 Kubiaczyk, Ireneusz 14 Plucińska, Agnieszka 14 Rzepecki, Bogdan 14 Ugowski, Henryk 13 Borzymowski, Andrzej 13 Zakowski, Wojciech 12 Ambrosiewicz, Jan 12 Deszcz, Ryszard 12 Dvurečenskij, Anatolij 12 Fisher, Brian 12 Grande, Zbigniew 12 Kasperski, Andrzej 12 Sadkowski, Wawrzyniec 11 Akkouchi, Mohamed 11 Bieszk, Leon 11 Gupta, V. C. 11 Majchrowski, Marian 11 Muszynski, Jerzy 11 Plucinski, Edmund 11 Pulmannová, Sylvia 11 Sidorowicz, Józef 11 Taberski, Roman 10 Anastassiou, George Angelos 10 Cho, Yeol Je 10 Denecke, Klaus Dieter 10 Dudek, Wiesław Aleksander 10 Maczynski, Maciej J. 10 Nguŷen Văn Mãu 10 Radzikowski, Jerzy 10 Rogulski, Jan Stanisław 9 Dabrowski, Jacek 9 Fudali, Stanisław 9 Godowski, Radosław M. 9 Grodzki, Zdzisław 9 Januszewski, Janusz 9 Länger, Helmut M. 9 Michalski, Jacek 9 Multarzyński, Piotr 9 Płonka, Jerzy 9 Rempulska, Lucyna 9 Thaheem, Allah-Bakhsh 9 Wolska-Bochenek, Janina 8 Agrawal, Purshottam Narain 8 Barański, Feliks 8 Binderman, Zbigniew 8 Dudek, Zbigniew 8 Dziok, Jacek 8 Ekici, Erdal 8 Gupta, Vijay 8 Matkowski, Janusz 8 Pomykała, Janusz Andrzej 8 Prażmowska, Małgorzata 8 Sladkowska-Zahorska, Janina 8 Srivastava, Girja Shanker 8 Wesołowski, Jacek 7 Benchohra, Mouffak 7 Bochenek, Jan 7 Chmaj, Jerzy 7 Dube, K. K. 7 Gök, Ömer 7 Jafari, Saeid 7 Kisielewicz, Michał 7 Kohli, Jogendra K. 7 Kohr, Gabriela 7 Liczberski, Piotr 7 Midura, Stanisław 7 Nivas, Ram 7 Pasternak-Winiarski, Zbigniew 7 Pathak, Hemant Kumar 7 Popenda, Jerzy Ryszard 7 Przybylski, Bronisław 7 Pysiak, Leszek 7 Rashwan, Rashwan Ahmed 7 Riečanová, Zdenka 7 Rutkowski, Aleksander 7 Stanczak, Romuald 7 Szynal, Dominik 7 Timoumi, Mohsen 7 von Wolfersdorf, Lothar 7 Vukman, Joso ...and 2,622 more Authors
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#### Fields

 446 Operator theory (47-XX) 352 Partial differential equations (35-XX) 352 Differential geometry (53-XX) 349 General topology (54-XX) 284 Functional analysis (46-XX) 271 Ordinary differential equations (34-XX) 268 Functions of a complex variable (30-XX) 227 Order, lattices, ordered algebraic structures (06-XX) 227 Real functions (26-XX) 208 Difference and functional equations (39-XX) 166 Probability theory and stochastic processes (60-XX) 156 Group theory and generalizations (20-XX) 153 Global analysis, analysis on manifolds (58-XX) 148 General algebraic systems (08-XX) 148 Integral equations (45-XX) 128 Mathematical logic and foundations (03-XX) 128 Geometry (51-XX) 123 Approximations and expansions (41-XX) 116 Numerical analysis (65-XX) 81 Combinatorics (05-XX) 78 Measure and integration (28-XX) 75 Harmonic analysis on Euclidean spaces (42-XX) 74 Associative rings and algebras (16-XX) 66 Computer science (68-XX) 64 Linear and multilinear algebra; matrix theory (15-XX) 62 Calculus of variations and optimal control; optimization (49-XX) 61 Statistics (62-XX) 57 Sequences, series, summability (40-XX) 56 Several complex variables and analytic spaces (32-XX) 46 Special functions (33-XX) 46 Manifolds and cell complexes (57-XX) 45 Number theory (11-XX) 43 Category theory; homological algebra (18-XX) 42 Systems theory; control (93-XX) 41 Quantum theory (81-XX) 38 Convex and discrete geometry (52-XX) 37 Dynamical systems and ergodic theory (37-XX) 35 Algebraic geometry (14-XX) 32 Mechanics of deformable solids (74-XX) 28 Integral transforms, operational calculus (44-XX) 27 Information and communication theory, circuits (94-XX) 25 Topological groups, Lie groups (22-XX) 25 Potential theory (31-XX) 23 Commutative algebra (13-XX) 21 Operations research, mathematical programming (90-XX) 18 Algebraic topology (55-XX) 18 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 17 History and biography (01-XX) 15 Mechanics of particles and systems (70-XX) 15 Biology and other natural sciences (92-XX) 13 Abstract harmonic analysis (43-XX) 12 Field theory and polynomials (12-XX) 10 Fluid mechanics (76-XX) 10 Classical thermodynamics, heat transfer (80-XX) 10 Relativity and gravitational theory (83-XX) 7 General and overarching topics; collections (00-XX) 7 Nonassociative rings and algebras (17-XX) 4 Optics, electromagnetic theory (78-XX) 2 Statistical mechanics, structure of matter (82-XX) 1 Astronomy and astrophysics (85-XX) 1 Mathematics education (97-XX)

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Orthogonal sets in effect algebras. Zbl 0989.03071
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Exponential stability and blow up for a problem with Balakrishnan-Taylor damping. Zbl 1227.35074
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On the proximal point algorithm and demimetric mappings in CAT(0) spaces. Zbl 06996751
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An alternative and easy approach to fixed point results via simulation functions. Zbl 1454.47080
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Evolutes and involutes of frontals in the Euclidean plane. Zbl 1323.58027
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Some sequence spaces defined by Orlicz functions. Zbl 0966.46002
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Determining ideals of a given finite index in a finitely presented semigroup. Zbl 0412.20066
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Periodic solutions of two-species diffusion models with continuous time delays. Zbl 1013.92035
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Common fixed point theorems with applications to nonlinear integral equations. Zbl 0939.47050
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A fixed point theorem in generalized metric spaces. Zbl 1272.54037
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2013
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2009
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Hyers-Ulam stability of first-order homogeneous linear dynamic equations on time scales. Zbl 1401.34096
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2008
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1979
Geometric fixed points for single and multivalued mappings. Zbl 0911.54039
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1997
Integral inequalities of Hadamard type for log-convex functions. Zbl 0912.26009
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1998
Compatible mappings of type $$(C)$$ and common fixed point theorems of Greguš type. Zbl 0922.54036
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The logic induced by a system of homomorphisms and its various algebraic characterizations. Zbl 0879.06005
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1997
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2014
A common fixed point result by altering distances involving a contractive condition of integral type in partial metric spaces. Zbl 1291.54049
Aydi, Hassen
2013
Multiplication operators on Cesàro sequence spaces. Zbl 1356.47043
Komal, B. S.; Pandoh, Suruchi; Raj, Kuldip
2016
A new generalization of the trapezoid formula for $$n$$-time differentiable mappings and applications. Zbl 0974.26010
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2000
The class of type G distributions on $$\mathbb{R}^d$$ and related subclasses of infinitely divisible distributions. Zbl 0989.60016
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2001
An estimate of the rate of convergence of a Bézier variant of the Baskakov-Kantorovich operators for bounded variation functions. Zbl 1028.41016
Abel, Ulrich; Gupta, Vijay
2003
On some fixed point theorems for multivalued $$F$$-contractions in partial metric spaces. Zbl 07367999
Kumar, Santosh; Luambano, Sholastica
2021
Two modifications of the inertial Tseng extragradient method with self-adaptive step size for solving monotone variational inequality problems. Zbl 1451.65079
Alakoya, Timilehin Opeyemi; Jolaoso, Lateef Olakunle; Mewomo, Oluwatosin Temitope
2020
Equivalence of the existence of best proximity points and best proximity pairs for cyclic and noncyclic nonexpansive mappings. Zbl 1446.47013
Gabeleh, Moosa; Künzi, Hans-Peter A.
2020
Two new forms of ordered soft separation axioms. Zbl 1439.54012
Al-shami, Tareq M.; El-Shafei, Mohammed E.
2020
Kim, Gwang Hui; Lee, Yang-Hi
2020
On soft $$p_c$$-separation axioms. Zbl 1443.54003
Hamko, Qumri H.; Ahmed, Nehmat K.; Khalaf, Alias B.
2020
Direct and strong converse inequalities for approximation with Fejér means. Zbl 1443.42001
Bustamante, Jorge
2020
On $$\theta$$-generalized demimetric mappings and monotone operators in Hadamard spaces. Zbl 07239297
Ogwo, Grace N.; Izuchukwu, Chinedu; Aremu, Kazeem O.; Mewomo, Oluwatosin T.
2020
On the domain of implicit functions in a projective limit setting without additional norm estimates. Zbl 1447.58007
Magnot, Jean-Pierre
2020
Scalar linear impulsive Riemann-Liouville fractional differential equations with constant delay-explicit solutions and finite time stability. Zbl 1450.34056
Hristova, Snezhana G.; Tersian, Stepan A.
2020
The special atom space and Haar wavelets in higher dimensions. Zbl 1446.42051
Kwessi, Eddy; de Souza, Geraldo; Djitte, Ngalla; Ndiaye, Mariama
2020
Existence results for nonlinear coupled system of integral equations of Urysohn Volterra-Chandrasekhar mixed type. Zbl 07271202
Nabil, Tamer
2020
Structure of $$n$$-quasi left $$m$$-invertible and related classes of operators. Zbl 07299078
Duggal, Bhagwati Prashad; Kim, In Hyun
2020
A self adaptive inertial subgradient extragradient algorithm for variational inequality and common fixed point of multivalued mappings in Hilbert spaces. Zbl 1418.49008
Jolaoso, Lateef Olakunle; Taiwo, Adeolu; Alakoya, Timilehin Opeyemi; Mewomo, Oluwatosin Temitope
2019
Analytic functions in the unit ball of bounded $$\mathbf L$$-index in joint variables and of bounded $$L$$-index in direction: a connection between these classes. Zbl 1415.32005
2019
Two types of separation axioms on supra soft topological spaces. Zbl 1423.54047
Al-shami, Tareq M.; El-Shafei, Mohammed E.
2019
Hyers-Ulam stability of a coupled system of fractional differential equations of Hilfer-Hadamard type. Zbl 1431.34004
2019
Existence and stability of impulsive coupled system of fractional integrodifferential equations. Zbl 1439.45010
2019
Convergence and stability of Fibonacci-Mann iteration for a monotone non-Lipschitzian mapping. Zbl 07126083
Aggarwal, Sajan; Uddin, Izhar
2019
On statistical convergence in quasi-metric spaces. Zbl 1426.54023
İlkhan, Merve; Kara, Emrah Evren
2019
On the existence of complex Hadamard submatrices of the Fourier matrices. Zbl 1408.15014
Bond, Bailey Madison; Glickfield, R. Alexander; Herr, John E.
2019
The differential-symbol method of constructing the quasi-polynomial solutions of two-point problem. Zbl 1411.35068
Nytrebych, Zinovii; Malanchuk, Oksana
2019
Moments of the weighted Cantor measures. Zbl 1428.28015
Harding, Steven N.; Riasanovsky, Alexander W. N.
2019
A new approach for solving Bratu’s problem. Zbl 1428.34031
Ghomanjani, Fateme; Shateyi, Stanford
2019
Ulam-Hyers stability of a parabolic partial differential equation. Zbl 1429.35027
Marian, Daniela; Ciplea, Sorina Anamaria; Lungu, Nicolaie
2019
Characterizations of compact operators on $$\ell_{p}$$-type fractional sets of sequences. Zbl 1425.46011
Özger, Faruk
2019
Generalizations of Darbo’s fixed point theorem for new condensing operators with application to a functional integral equation. Zbl 07074049
Rehman, Habib ur; Gopal, Dhananjay; Kumam, Poom
2019
The analytical solution of Van der Pol and Liénard differential equations within conformable fractional operator by retarded integral inequalities. Zbl 1423.26019
Usta, Fuat; Sarıkaya, Mehmet Zeki
2019
Slice holomorphic solutions of some directional differential equations with bounded $$L$$-index in the same direction. Zbl 1436.32004
Bandura, Andriy; Skaskiv, Oleh; Smolovyk, Liana
2019
A nonstandard Volterra integral equation on time scales. Zbl 1444.45004
2019
New results on the $$q$$-generalized Bernoulli polynomials of level $$m$$. Zbl 1436.33018
Urieles, Alejandro; Ortega, María José; Ramírez, William; Vega, Samuel
2019
A unified algorithm for solving split generalized mixed equilibrium problem, and for finding fixed point of nonspreading mapping in Hilbert spaces. Zbl 1401.65065
Jolaoso, Lateef Olakunle; Oyewole, Kazeem Olawale; Okeke, Chibueze Christian; Mewomo, Oluwatosin Temitope
2018
On the proximal point algorithm and demimetric mappings in CAT(0) spaces. Zbl 06996751
Aremu, Kazeem O.; Izuchukwu, Chinedu; Ugwunnadi, Godwin C.; Mewomo, Oluwatosin T.
2018
Hyers-Ulam stability of first-order homogeneous linear dynamic equations on time scales. Zbl 1401.34096
Anderson, Douglas R.; Onitsuka, Masakazu
2018
On trigonometric approximation of functions in the $$L^{q}$$ norm. Zbl 1388.42003
Mohapatra, Ram N.; Szal, Bogdan
2018
The group of diffeomorphisms of a non-compact manifold is not regular. Zbl 1387.22019
Magnot, Jean-Pierre
2018
A short note on the common fixed points of the Geraghty contraction of type $$E_{S,T}$$. Zbl 06955078
Alqahtani, Badr; Fulga, Andreea; Karapınar, Erdal
2018
Degree of $$(L, M)$$-fuzzy semi-precontinuous and $$(L, M)$$-fuzzy semi-preirresolute functions. Zbl 1398.54011
Al-Omeri, Wadei F.; Khalil, O. H.; Ghareeb, A.
2018
Noncyclic Meir-Keeler contractions and best proximity pair theorems. Zbl 06955035
Gabeleh, Moosa; Markin, Jack
2018
Ergodic and fixed point theorems for sequences and nonlinear mappings in a Hilbert space. Zbl 06864368
2018
Approximation of additive functional equations in NA Lie $$C^\star$$-algebras. Zbl 1394.39028
2018
On Montessus de Ballore’s theorem for simultaneous Padé-Faber approximants. Zbl 1388.30042
Bosuwan, Nattapong
2018
On existence of the support of a Borel measure. Zbl 1391.28013
Kozarzewski, Piotr A.
2018
Approximations by multivariate sublinear and Max-product operators under convexity. Zbl 1391.41013
Anastassiou, George A.
2018
Global attractivity for Volterra type Hadamard fractional integral equations in Fréchet spaces. Zbl 1393.45003
Abbas, Saïd; Agarwal, Ravi P.; Benchohra, Mouffak; Berhoun, Farida
2018
Certain Laplace transforms of convolution type integrals involving product of two special $$_{p}F_{p}$$ functions. Zbl 1404.33004
Milovanović, Gradimir V.; Parmar, Rakesh K.; Rathie, Arjun K.
2018
Pointwise approximation of $$2 \pi/r$$-periodic functions by matrix operators of their Fourier series with $$r$$-differences of the entries. Zbl 1404.42007
Łenski, Włodzimierz; Szal, Bogdan
2018
An alternative and easy approach to fixed point results via simulation functions. Zbl 1454.47080
Radenovic, Stojan; Vetro, Francesca; Vujaković, Jelena
2017
Some fixed point results on $$G$$-metric and $$G_b$$-metric spaces. Zbl 1453.54027
2017
Two properties of Müntz spaces. Zbl 1385.46006
Abrahamsen, Trond A.; Leraand, Aleksander; Martiny, André; Nygaard, Olav
2017
Rate of convergence for Ibragimov-Gadjiev-Durrmeyer operators. Zbl 1366.41012
Acar, Tuncer
2017
Derivatives of a polynomial of best approximation and modulus of smoothness in generalized Lebesgue spaces with variable exponent. Zbl 1375.41017
2017
$$P_\beta$$-connectedness in topological spaces. Zbl 1380.54017
Tyagi, Brij K.; Singh, Sumit; Bhardwaj, Manoj
2017
Quantum Riemannian geometry of phase space and nonassociativity. Zbl 1368.81106
Beggs, Edwin J.; Majid, Shahn
2017
Diophantine approximations and almost periodic functions. Zbl 1369.42004
2017
Multiplication operators on the space of functions of bounded variation. Zbl 1367.26030
Astudillo-Villalba, Franklin R.; Ramos-Fernández, Julio C.
2017
Common fixed point theorems via generalized condition (B) in quasi-partial metric space and applications. Zbl 06815232
Tomar, Anita; Beloul, Said; Sharma, Ritu; Upadhyay, Shivangi
2017
Concrete minimal $$3 \times 3$$ Hermitian matrices and some general cases. Zbl 1381.15032
Klobouk, Abel H.; Varela, Alejandro
2017
On Weil homomorphism in locally free sheaves over structured spaces. Zbl 1378.14013
Falkiewicz, Ewa; Sasin, Wiesław
2017
Sasakian structures a foliated approach. Zbl 1457.53033
Wolak, Robert A.
2017
Rate of convergence of Szász-beta operators based on $$q$$-integers. Zbl 1366.41013
Gupta, Pooja; Agrawal, Purshottam Narain
2017
Second order evolution equations with nonlocal conditions. Zbl 1440.34063
Benchohra, Mouffak; Nieto, Juan J.; Rezoug, Noreddine
2017
Multiplication operators on Cesàro sequence spaces. Zbl 1356.47043
Komal, B. S.; Pandoh, Suruchi; Raj, Kuldip
2016
Semi-slant submersions from almost product Riemannian manifolds. Zbl 1345.53032
Gündüzalp, Yılmaz
2016
Localization results for the non-truncated max-product sampling operators based on Fejér and sinc-type kernels. Zbl 1347.41027
Coroianu, Lucian; Gal, Sorin G.
2016
A variant of Jensen’s functional equation on semigroups. Zbl 1354.39016
Fadli, Brahim; Zeglami, Driss; Kabbaj, Samir
2016
Montel-type theorems for exponential polynomials. Zbl 1344.43002
Almira, J. M.; Székelyhidi, L.
2016
C3-modules. Zbl 1362.16002
Atani, Shahabaddin Ebrahimi; Khoramdel, Mehdi; Hesari, Saboura Dolati Pish
2016
Classification of subgroups of symplectic groups over finite fields containing a transvection. Zbl 1341.20043
Arias-de-Reyna, Sara; Dieulefait, Luis; Wiese, Gabor
2016
On an open problem of Xiao-Bin Zhang and Jun-Feng Xu. Zbl 1338.30022
Majumder, Sujoy
2016
A perspective approach for characterization of Lieb concavity theorem. Zbl 1352.81018
Nikoufar, Ismail
2016
Intuitionistic fuzzy almost Cauchy-Jensen mappings. Zbl 1334.39058
2016
Interpolations of Bargmann type measures. Zbl 1345.30040
Asai, Nobuhiro; Krystek, Anna Dorota; Wojakowski, Łukasz Jan
2016
Common fixed point theorems for mappings under ($$\mathrm{CLR}_{S}$$)-property in partial metric spaces. Zbl 1347.54105
Rao, K. P. R.; Imdad, M.; Parvathi, K. V. Siva
2016
More general common fixed point theorems under a new concept. Zbl 1338.54158
2016
Semigroup of $$k$$-bi-ideals of a semiring with semilattice additive reduct. Zbl 1341.16045
Bhuniya, Anjan K.; Jana, K.
2016
Asymptotically lacunary statistical equivalence of double sequences of sets. Zbl 1354.40003
Nuray, Fatih; Patterson, Richard F.; Dündar, Erdinç
2016
$$p-$$cyclic $$C$$-contraction result in Menger spaces using a control function. Zbl 1346.54019
Choudhury, Binayak S.; Bhandari, Samir Kumar
2016
On a method of introducing free-infinitely divisible probability measures. Zbl 1386.60021
Jurek, Zbigniew J.
2016
Marczewski-Burstin representations vs. Bernstein and dense subsets. Zbl 1352.03051
Nowik, Andrzej
2016
Probabilistic generalized metric spaces and nonlinear contractions. Zbl 1353.54021
Mbarki, Abderrahim; Naciri, Rachid
2016
Evolutes and involutes of frontals in the Euclidean plane. Zbl 1323.58027
Fukunaga, Tomonori; Takahashi, Masatomo
2015
Flat approximations of surfaces along curves. Zbl 1330.57045
Izumiya, Shyuichi; Otani, Saki
2015
Multi-sorted logic and logical geometry: some problems. Zbl 1344.08003
Plotkin, B.; Plotkin, E.
2015
Unimodality of Boolean and monotone stable distributions. Zbl 1336.46056
Hasebe, Takahiro; Sakuma, Noriyoshi
2015
Approximation properties of certain summation integral type operators. Zbl 1312.41024
Patel, Prashantkumar; Mishra, Vishnu Narayan
2015
Centre symmetry sets of families of plane curves. Zbl 1336.57041
Giblin, Peter; Reeve, Graham
2015
One-sided quantum quasigroups and loops. Zbl 1352.20045
Smith, J. D. H.
2015
Gauss-Manin connections for boundary singularities and isochore deformations. Zbl 1319.14005
Kourliouros, Konstantinos
2015
On the links of simple singularities, simple elliptic singularities and cusp singularities. Zbl 1322.32021
Kasuya, Naohiko
2015
$$C^T$$-right equivalence of analytic functions. Zbl 1320.32012
Migus, Piotr
2015
Symplectic $$U_7$$, $$U_8$$ and $$U_9$$ singularities. Zbl 1373.53105
Trębska, Żaneta
2015
The finite basis problem for Kiselman monoids. Zbl 1338.20052
Ashikhmin, D. N.; Volkov, M. V.; Zhang, Wen Ting
2015
Green’s relations in the commutative centralizers of monounary algebras. Zbl 1343.08001
Jakubíková-Studenovská, Danica; Šuličová, Miroslava
2015
Symplectic singularities and solvable Hamiltonian mappings. Zbl 1330.53101
Fukuda, Takuo; Janeczko, Stanislaw
2015
Fractional representation formulae under initial conditions and fractional Ostrowski type inequalities. Zbl 1321.26009
Anastassiou, George A.
2015
Korovkin type theorem for sequences of operators depending on a parameter. Zbl 1321.41035
Finta, Zoltán
2015
Certain generalized $$q$$-operators. Zbl 1321.41040
Prakash, Om; Sharma, Diwaker; Maheshwari (Sharma), Prerna
2015
Fixed point theorems on generalized metric spaces for mappings in a class of almost $$\varphi$$-contractions. Zbl 1343.54014
Kikina, Luljeta; Kikina, Kristaq
2015
Relatively orthocomplemented skew nearlattices in Rickart rings. Zbl 1350.06006
Cīrulis, Jānis
2015
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