Macías-Virgós, Enrique; Mosquera-Lois, David; Oprea, John \(m\)-homotopic distance. (English) Zbl 1525.55004 Topology Appl. 339, Part A, Article ID 108589, 9 p. (2023). Reviewer: Yuli Rudyak (Gainesville) MSC: 55M30 55P99 PDFBibTeX XMLCite \textit{E. Macías-Virgós} et al., Topology Appl. 339, Part A, Article ID 108589, 9 p. (2023; Zbl 1525.55004) Full Text: DOI
Lupton, Greg; Oprea, John; Scoville, Nicholas A. The digital Hopf construction. (English) Zbl 1514.55013 Topology Appl. 326, Article ID 108405, 19 p. (2023). Reviewer: Christopher Staecker (Fairfield) MSC: 55Q99 54A99 55R10 68R99 54H30 PDFBibTeX XMLCite \textit{G. Lupton} et al., Topology Appl. 326, Article ID 108405, 19 p. (2023; Zbl 1514.55013) Full Text: DOI arXiv
Lupton, Gregory; Oprea, John; Scoville, Nicholas A. Subdivision of maps of digital images. (English) Zbl 1487.55018 Discrete Comput. Geom. 67, No. 3, 698-742 (2022). Reviewer: Dimitrios Georgiou (Patras) MSC: 55P99 54A40 68U10 PDFBibTeX XMLCite \textit{G. Lupton} et al., Discrete Comput. Geom. 67, No. 3, 698--742 (2022; Zbl 1487.55018) Full Text: DOI arXiv
Bazzoni, Giovanni; Lupton, Gregory; Oprea, John Homotopy invariants and almost non-negative curvature. (English) Zbl 1489.55006 Math. Z. 300, No. 2, 1117-1140 (2022). Reviewer: Aleksandar Milivojevic (Bonn) MSC: 55P62 55R10 55M30 PDFBibTeX XMLCite \textit{G. Bazzoni} et al., Math. Z. 300, No. 2, 1117--1140 (2022; Zbl 1489.55006) Full Text: DOI arXiv
Lupton, Gregory; Oprea, John; Scoville, Nicholas A. Homotopy theory in digital topology. (English) Zbl 1481.54060 Discrete Comput. Geom. 67, No. 1, 112-165 (2022). Reviewer: Ege Özgür (Izmir) MSC: 54H30 55P99 68U10 55P05 55M25 55M30 PDFBibTeX XMLCite \textit{G. Lupton} et al., Discrete Comput. Geom. 67, No. 1, 112--165 (2022; Zbl 1481.54060) Full Text: DOI arXiv
Lupton, Gregory; Oprea, John; Scoville, Nicholas A. A fundamental group for digital images. (English) Zbl 1481.55008 J. Appl. Comput. Topol. 5, No. 2, 249-311 (2021). Reviewer: Dae-Woong Lee (Jeonju) MSC: 55Q99 57M05 68U10 68R99 54H30 PDFBibTeX XMLCite \textit{G. Lupton} et al., J. Appl. Comput. Topol. 5, No. 2, 249--311 (2021; Zbl 1481.55008) Full Text: DOI arXiv
Angel, A.; Colman, H.; Grant, M.; Oprea, J. Morita invariance of equivariant Lusternik-Schnirelmann category and invariant topological complexity. (English) Zbl 1462.55001 Theory Appl. Categ. 35, 179-195 (2020). Reviewer: Gregory Lupton (Cleveland) MSC: 55M30 55R91 55P91 PDFBibTeX XMLCite \textit{A. Angel} et al., Theory Appl. Categ. 35, 179--195 (2020; Zbl 1462.55001) Full Text: arXiv Link
Farber, Michael; Grant, Mark; Lupton, Gregory; Oprea, John An upper bound for topological complexity. (English) Zbl 1410.55002 Topology Appl. 255, 109-125 (2019). Reviewer: José Calcines (La Laguna) MSC: 55M30 55P99 PDFBibTeX XMLCite \textit{M. Farber} et al., Topology Appl. 255, 109--125 (2019; Zbl 1410.55002) Full Text: DOI arXiv
Bazzoni, Giovanni; Lupton, Gregory; Oprea, John Parallel forms, co-Kähler manifolds and their models. (English) Zbl 1395.55013 Bull. Belg. Math. Soc. - Simon Stevin 25, No. 1, 1-11 (2018). Reviewer: Gabriela Paola Ovando (Rosario) MSC: 55P62 PDFBibTeX XMLCite \textit{G. Bazzoni} et al., Bull. Belg. Math. Soc. - Simon Stevin 25, No. 1, 1--11 (2018; Zbl 1395.55013) Full Text: arXiv Euclid
Bazzoni, Giovanni; Lupton, Gregory; Oprea, John Hereditary properties of co-Kähler manifolds. (English) Zbl 1358.55010 Differ. Geom. Appl. 50, 126-139 (2017). Reviewer: Vasile Oproiu (Iaşi) MSC: 55P62 53D15 PDFBibTeX XMLCite \textit{G. Bazzoni} et al., Differ. Geom. Appl. 50, 126--139 (2017; Zbl 1358.55010) Full Text: DOI arXiv
Oprea, John Book review of: Y. Félix et al., Rational homotopy theory II. (English) Zbl 1334.00057 Jahresber. Dtsch. Math.-Ver. 118, No. 1, 57-66 (2016). MSC: 00A17 55-02 55P62 PDFBibTeX XMLCite \textit{J. Oprea}, Jahresber. Dtsch. Math.-Ver. 118, No. 1, 57--66 (2016; Zbl 1334.00057) Full Text: DOI
Félix, Yves; Oprea, John; Tanré, Daniel Lie-model for Thom spaces of tangent bundles. (English) Zbl 1336.55008 Proc. Am. Math. Soc. 144, No. 4, 1829-1840 (2016). Reviewer: Katsuhiko Kuribayashi (Nagano) MSC: 55P62 55R25 PDFBibTeX XMLCite \textit{Y. Félix} et al., Proc. Am. Math. Soc. 144, No. 4, 1829--1840 (2016; Zbl 1336.55008) Full Text: DOI
Oprea, John Aspects of Lusternik-Schnirelmann category. (English) Zbl 1356.55001 Mladenov, Ivaïlo M. (ed.) et al., Proceedings of the 16th international conference on geometry, integrability and quantization, Sts. Constantine and Elena (near Varna), Bulgaria, June 6–11, 2014. Sofia: Avangard Prima. Geometry, Integrability and Quantization, 13-35 (2015). Reviewer: Jean Claude Thomas (Angers) MSC: 55-02 55M30 55P99 PDFBibTeX XMLCite \textit{J. Oprea}, in: Proceedings of the 16th international conference on geometry, integrability and quantization, Sts. Constantine and Elena (near Varna), Bulgaria, June 6--11, 2014. Sofia: Avangard Prima. 13--35 (2015; Zbl 1356.55001) Full Text: DOI
Grant, Mark; Lupton, Gregory; Oprea, John A mapping theorem for topological complexity. (English) Zbl 1321.55002 Algebr. Geom. Topol. 15, No. 3, 1643-1666 (2015). Reviewer: Yuli Rudyak (Gainesville) MSC: 55M30 55P35 55P62 PDFBibTeX XMLCite \textit{M. Grant} et al., Algebr. Geom. Topol. 15, No. 3, 1643--1666 (2015; Zbl 1321.55002) Full Text: DOI arXiv
Oprea, John Applications of Lusternik-Schnirelmann category and its generalizations. (English) Zbl 1330.55002 J. Geom. Symmetry Phys. 36, 59-97 (2014). Reviewer: Jean Claude Thomas (Angers) MSC: 55-02 55M30 55P62 55P50 PDFBibTeX XMLCite \textit{J. Oprea}, J. Geom. Symmetry Phys. 36, 59--97 (2014; Zbl 1330.55002)
Oprea, John; Strom, Jeff On Fox’s \(m\)-dimensional category and theorems of Bochner type. (English) Zbl 1236.55005 Topology Appl. 159, No. 5, 1448-1461 (2012). Reviewer: Michael Farber (Zürich) MSC: 55M30 55P99 53C21 PDFBibTeX XMLCite \textit{J. Oprea} and \textit{J. Strom}, Topology Appl. 159, No. 5, 1448--1461 (2012; Zbl 1236.55005) Full Text: DOI
Oprea, John F. (ed.); Tanré, Daniel (ed.) Working session: Rational homotopy theory in mathematics and physics. (Arbeitsgemeinschaft: Rational homotopy theory in mathematics and physics.) (English) Zbl 1334.00100 Oberwolfach Rep. 8, No. 2, 993-1045 (2011). MSC: 00B05 00B25 55-06 18-06 55P62 18G55 PDFBibTeX XMLCite \textit{J. F. Oprea} (ed.) and \textit{D. Tanré} (ed.), Oberwolfach Rep. 8, No. 2, 993--1045 (2011; Zbl 1334.00100) Full Text: DOI
Oprea, John; Strom, Jeff Mixing categories. (English) Zbl 1227.55003 Proc. Am. Math. Soc. 139, No. 9, 3383-3392 (2011). Reviewer: Aniceto Murillo (Malaga) MSC: 55M30 55P99 PDFBibTeX XMLCite \textit{J. Oprea} and \textit{J. Strom}, Proc. Am. Math. Soc. 139, No. 9, 3383--3392 (2011; Zbl 1227.55003) Full Text: DOI
Félix, Yves [Oprea, J.; Smith, S.; Strom, J.; Lazarev, A.; Tanré, D.; Wockel, C.] Problems on mapping spaces and related subjects. (English) Zbl 1208.55007 Félix, Yves (ed.) et al., Homotopy theory of function spaces and related topics. Proceedings of the Oberwolfach workshop, Mathematisches Forschungsinstitut Oberwolfach, Germany, April 5–11, 2009. Providence, RI: American Mathematical Society (AMS) (ISBN 978-0-8218-4929-3/pbk). Contemporary Mathematics 519, 217-230 (2010). MSC: 55P99 55M99 00A07 PDFBibTeX XMLCite \textit{Y. Félix}, Contemp. Math. 519, 217--230 (2010; Zbl 1208.55007)
Oprea, John; Strom, Jeff On the realizability of Gottlieb groups. (English) Zbl 1209.55007 Félix, Yves (ed.) et al., Homotopy theory of function spaces and related topics. Proceedings of the Oberwolfach workshop, Mathematisches Forschungsinstitut Oberwolfach, Germany, April 5–11, 2009. Providence, RI: American Mathematical Society (AMS) (ISBN 978-0-8218-4929-3/pbk). Contemporary Mathematics 519, 181-188 (2010). Reviewer: Simona Settepanella (Pisa) MSC: 55Q52 PDFBibTeX XMLCite \textit{J. Oprea} and \textit{J. Strom}, Contemp. Math. 519, 181--188 (2010; Zbl 1209.55007)
Oprea, John; Strom, Jeff Lusternik-Schnirelmann category, complements of skeleta and a theorem of Dranishnikov. (English) Zbl 1204.55004 Algebr. Geom. Topol. 10, No. 2, 1165-1186 (2010). Reviewer: Yuli Rudyak (Gainesville) MSC: 55M30 54F45 55P99 57R17 PDFBibTeX XMLCite \textit{J. Oprea} and \textit{J. Strom}, Algebr. Geom. Topol. 10, No. 2, 1165--1186 (2010; Zbl 1204.55004) Full Text: DOI
Félix, Yves; Oprea, John Rational homotopy of gauge groups. (English) Zbl 1168.55010 Proc. Am. Math. Soc. 137, No. 4, 1519-1527 (2009). Reviewer: Corina Mohorianu (Iaşi) MSC: 55P99 57R91 57S05 PDFBibTeX XMLCite \textit{Y. Félix} and \textit{J. Oprea}, Proc. Am. Math. Soc. 137, No. 4, 1519--1527 (2009; Zbl 1168.55010) Full Text: DOI
Oprea, John The propagation of non-Lefschetz type, the Gottlieb group and related questions. (English) Zbl 1148.53066 J. Fixed Point Theory Appl. 3, No. 1, 63-77 (2008). MSC: 53D35 55P99 PDFBibTeX XMLCite \textit{J. Oprea}, J. Fixed Point Theory Appl. 3, No. 1, 63--77 (2008; Zbl 1148.53066) Full Text: DOI Link
Félix, Yves; Oprea, John; Tanré, Daniel Algebraic models in geometry. (English) Zbl 1149.53002 Oxford Graduate Texts in Mathematics 17. Oxford: Oxford University Press (ISBN 978-0-19-920651-3/hbk; 978-0-19-920652-0/pbk). xxi, 460 p. (2008). Reviewer: Grigori N. Milstein (Ekaterinburg) MSC: 53-02 57-02 58-02 53C20 16E45 53C22 PDFBibTeX XMLCite \textit{Y. Félix} et al., Algebraic models in geometry. Oxford: Oxford University Press (2008; Zbl 1149.53002) Backlinks: MO
Cornea, Octav; Lupton, Gregory; Oprea, John; Tanré, Daniel Lusternik-Schnirelmann category. (English) Zbl 1032.55001 Mathematical Surveys and Monographs. 103. Providence, RI: American Mathematical Society (AMS). xvii, 330 p. (2003). Reviewer: Yuli Rudyak (Gainesville) MSC: 55-02 55M30 55P62 55Q25 57R17 58E05 37B30 53D35 53D12 55P60 37C99 PDFBibTeX XMLCite \textit{O. Cornea} et al., Lusternik-Schnirelmann category. Providence, RI: American Mathematical Society (AMS) (2003; Zbl 1032.55001)
Oprea, John Homotopy theory and circle actions on symplectic manifolds. (English) Zbl 0926.53029 Oprea, John (ed.) et al., Homotopy and geometry. Proceedings of the workshop, Banach Center, Warsaw, Poland, June 9–13, 1997. Warsaw: Polish Academy of Sciences, Banach Cent. Publ. 45, 63-86 (1998). Reviewer: K.H.Dovermann (Honolulu) MSC: 53D05 57S25 PDFBibTeX XMLCite \textit{J. Oprea}, Banach Cent. Publ. 45, 63--86 (1998; Zbl 0926.53029) Full Text: EuDML
Oprea, John (ed.); Tralle, Aleksy (ed.) Homotopy and geometry. Proceedings of the workshop, Banach Center, Warsaw, Poland, June 9–13, 1997. (English) Zbl 0906.00019 Banach Center Publications. 45. Warsaw: Polish Academy of Sciences, 240 p. (1998). MSC: 00B25 55-06 58-06 PDFBibTeX XMLCite \textit{J. Oprea} (ed.) and \textit{A. Tralle} (ed.), Homotopy and geometry. Proceedings of the workshop, Banach Center, Warsaw, Poland, June 9--13, 1997. Warsaw: Polish Academy of Sciences (1998; Zbl 0906.00019)
Oprea, John; Tralle, Aleksy Koszul-Sullivan models and the cohomology of certain solvmanifolds. (English) Zbl 0891.53021 Ann. Global Anal. Geom. 15, No. 4, 347-360 (1997). Reviewer: M.de León (Madrid) MSC: 53C15 55P62 PDFBibTeX XMLCite \textit{J. Oprea} and \textit{A. Tralle}, Ann. Global Anal. Geom. 15, No. 4, 347--360 (1997; Zbl 0891.53021) Full Text: DOI
Tralle, Aleksy; Oprea, John Symplectic manifolds with no Kähler structure. (English) Zbl 0891.53001 Lecture Notes in Mathematics. 1661. Berlin: Springer. viii, 207 p. (1997). Reviewer: M.Fernandez (Bilbao) MSC: 53-02 53C15 55P62 PDFBibTeX XMLCite \textit{A. Tralle} and \textit{J. Oprea}, Symplectic manifolds with no Kähler structure. Berlin: Springer (1997; Zbl 0891.53001) Full Text: DOI
Lupton, Gregory; Oprea, John Fixed points and powers of self-maps of \(H\)-spaces. (English) Zbl 0867.55011 Proc. Am. Math. Soc. 124, No. 10, 3235-3239 (1996). Reviewer: J.C.Thomas (Angers) MSC: 55P62 55M20 55P45 PDFBibTeX XMLCite \textit{G. Lupton} and \textit{J. Oprea}, Proc. Am. Math. Soc. 124, No. 10, 3235--3239 (1996; Zbl 0867.55011) Full Text: DOI
Oprea, John Gottlieb groups, group actions, fixed points and rational homotopy. (English) Zbl 0834.55001 Lecture Notes Series, Seoul. 29. Seoul: Seoul National Univ. 54 p. (1995). Reviewer: J.C.Thomas (Villeneuve d’Ascq) MSC: 55-02 57-02 55P62 55M20 57S99 PDFBibTeX XMLCite \textit{J. Oprea}, Gottlieb groups, group actions, fixed points and rational homotopy. Seoul: Seoul National Univ. (1995; Zbl 0834.55001)
Lupton, Gregory; Oprea, John Cohomologically symplectic spaces: Toral actions and the Gottlieb group. (English) Zbl 0836.57019 Trans. Am. Math. Soc. 347, No. 1, 261-288 (1995). Reviewer: J.C.Thomas (Villeneuve d’Ascq) MSC: 57R19 37J99 55P62 57S25 PDFBibTeX XMLCite \textit{G. Lupton} and \textit{J. Oprea}, Trans. Am. Math. Soc. 347, No. 1, 261--288 (1995; Zbl 0836.57019) Full Text: DOI
Lupton, Gregory; Oprea, John Symplectic manifolds and formality. (English) Zbl 0789.55010 J. Pure Appl. Algebra 91, No. 1-3, 193-207 (1994). Reviewer: Y.Felix (Louvain-La-Neuve) MSC: 55P62 53C55 PDFBibTeX XMLCite \textit{G. Lupton} and \textit{J. Oprea}, J. Pure Appl. Algebra 91, No. 1--3, 193--207 (1994; Zbl 0789.55010) Full Text: DOI
McCord, Christopher; Oprea, John Rational Ljusternik-Schnirelmann category and the Arnol’d conjecture for nilmanifolds. (English) Zbl 0798.58017 Topology 32, No. 4, 701-717 (1993). Reviewer: Th.J.Bartsch (Heidelberg) MSC: 58E05 37J99 55M30 55P62 PDFBibTeX XMLCite \textit{C. McCord} and \textit{J. Oprea}, Topology 32, No. 4, 701--717 (1993; Zbl 0798.58017) Full Text: DOI
Oprea, John; Pak, Jingyal Principal bundles over tori and maps which induce the identity on homotopy. (English) Zbl 0794.55009 Topology Appl. 52, No. 1, 11-22 (1993). Reviewer: D.H.Gottlieb (Lafayette) MSC: 55P62 55R99 PDFBibTeX XMLCite \textit{J. Oprea} and \textit{J. Pak}, Topology Appl. 52, No. 1, 11--22 (1993; Zbl 0794.55009) Full Text: DOI
Oprea, John The category of nilmanifolds. (English) Zbl 0755.55004 Enseign. Math., II. Sér. 38, No. 1-2, 27-40 (1992). Reviewer: Y.Felix (Louvain-La-Neuve) MSC: 55P62 55M30 57N65 PDFBibTeX XMLCite \textit{J. Oprea}, Enseign. Math. (2) 38, No. 1--2, 27--40 (1992; Zbl 0755.55004)
Oprea, John Finite group actions on spheres and the Gottlieb group. (English) Zbl 0736.55011 J. Korean Math. Soc. 28, No. 1, 65-78 (1991). Reviewer: D.H.Gottlieb (Lafayette) MSC: 55Q99 57S25 55Q05 PDFBibTeX XMLCite \textit{J. Oprea}, J. Korean Math. Soc. 28, No. 1, 65--78 (1991; Zbl 0736.55011)
Oprea, John A homotopical Conner-Raymond theorem and a question of Gottlieb. (English) Zbl 0661.57014 Can. Math. Bull. 33, No. 2, 219-229 (1990). Reviewer: J.Oprea MSC: 57S10 55P91 55R10 PDFBibTeX XMLCite \textit{J. Oprea}, Can. Math. Bull. 33, No. 2, 219--229 (1990; Zbl 0661.57014) Full Text: DOI
Oprea, John Decompositions of localized fibres and cofibres. (English) Zbl 0618.55008 Can. Math. Bull. 31, No. 4, 424-431 (1988). MSC: 55P99 55P60 55R05 55P62 55P05 PDFBibTeX XMLCite \textit{J. Oprea}, Can. Math. Bull. 31, No. 4, 424--431 (1988; Zbl 0618.55008) Full Text: DOI
Oprea, John The Samelson space of a fibration. (English) Zbl 0618.55005 Mich. Math. J. 34, 127-141 (1987). Reviewer: V.Oproiu MSC: 55P62 55R05 PDFBibTeX XMLCite \textit{J. Oprea}, Mich. Math. J. 34, 127--141 (1987; Zbl 0618.55005) Full Text: DOI
Oprea, John Decomposition theorems in rational homotopy theory. (English) Zbl 0602.55006 Proc. Am. Math. Soc. 96, 505-512 (1986). Reviewer: H.Scheerer MSC: 55P62 55R05 PDFBibTeX XMLCite \textit{J. Oprea}, Proc. Am. Math. Soc. 96, 505--512 (1986; Zbl 0602.55006) Full Text: DOI
Oprea, John Descent in rational homotopy theory. (English) Zbl 0596.55006 Libertas Math. 6, 153-165 (1986). Reviewer: J.-C.Thomas MSC: 55P62 PDFBibTeX XMLCite \textit{J. Oprea}, Libertas Math. 6, 153--165 (1986; Zbl 0596.55006)
Oprea, John F. DGA homology decompositions and a condition for formality. (English) Zbl 0576.55006 Ill. J. Math. 30, 122-137 (1986). MSC: 55P62 55P05 55S45 PDFBibTeX XMLCite \textit{J. F. Oprea}, Ill. J. Math. 30, 122--137 (1986; Zbl 0576.55006)
Oprea, John F. DGA homology decompositions and a condition for formality. (English) Zbl 0565.55012 Ill. J. Math. (to appear). MSC: 55P62 55P05 55S45 PDFBibTeX XML
Oprea, John F. Lifting homotopy actions in rational homotopy theory. (English) Zbl 0549.55008 J. Pure Appl. Algebra 32, 177-190 (1984). Reviewer: R.Schwänzl MSC: 55P62 57S17 55P91 PDFBibTeX XMLCite \textit{J. F. Oprea}, J. Pure Appl. Algebra 32, 177--190 (1984; Zbl 0549.55008) Full Text: DOI