Edit Profile (opens in new tab) Porter, Timothy Compute Distance To: Compute Author ID: porter.timothy Published as: Porter, Timothy; Porter, T.; Porter, Tim more...less Homepage: https://ncatlab.org/timporter/show/HomePage External Links: MGP · ORCID · dblp Documents Indexed: 124 Publications since 1972, including 6 Books 1 Contribution as Editor Reviewing Activity: 280 Reviews Co-Authors: 31 Co-Authors with 49 Joint Publications 514 Co-Co-Authors all top 5 Co-Authors 68 single-authored 11 Brown, Ronald 10 Cordier, Jean-Marc 7 Kamps, Klaus Heiner 4 Hernández Paricio, Luis Javier 3 Arvasi, Zekeriya 3 Gilbert, Nick D. 2 Bak, Anthony 2 Ehlers, Philip John 2 Golasiński, Marek 2 Hardie, Keith A. 2 Korkes, F. J. 2 Minian, Elias Gabriel 2 Tonks, Andrew 1 Blute, Richard F. 1 Bullejos, Manuel 1 Clementino, Maria Manuel 1 Cockett, J. Robin B. 1 Donadze, Guram 1 Ellis, Graham J. 1 Gran, Marino 1 Gratus, Jonathan 1 Inassaridze, Nikoloz 1 Janelidze, George 1 Lawson, Mark Verus 1 Martins, João Nuno Goncalves Faria 1 Matthews, Joseph 1 Moore, Elvin J. 1 Seda, Anthony Karel 1 Seely, Robert A. G. 1 Turaev, Vladimir Georgievich 1 Wensley, Christopher D. all top 5 Serials 10 Cahiers de Topologie et Géométrie Différentielle Catégoriques 9 Journal of Pure and Applied Algebra 9 Comptes Rendus Hebdomadaires des Séances de l’Académie des Sciences, Série A 6 Theory and Applications of Categories 5 Journal of Algebra 5 Annales de la Société Scientifique de Bruxelles. Série I 5 Proceedings of the Royal Irish Academy. Section A, Mathematical and Physical Sciences 4 Topology and its Applications 4 \(K\)-Theory 3 Mathematical Proceedings of the Cambridge Philosophical Society 3 Journal of the London Mathematical Society. Second Series 3 Theoretical Computer Science 3 Applied Categorical Structures 3 Journal of Homotopy and Related Structures 2 Mathematica Scandinavica 2 Proceedings of the Edinburgh Mathematical Society. Series II 2 Cubo Matemática Educacional 2 Cahiers de Topologie et Géométrie Différentielle Catégoriques 2 Bulletin de l’Académie Polonaise des Sciences, Série des Sciences Mathématiques, Astronomiques et Physiques 2 Supplemento ai Rendiconti del Circolo Matemàtico di Palermo. Serie II 1 Advances in Mathematics 1 Archiv der Mathematik 1 Bulletin of the London Mathematical Society 1 Collectanea Mathematica 1 Fundamenta Mathematicae 1 Mathematische Zeitschrift 1 Proceedings of the American Mathematical Society 1 Quaestiones Mathematicae 1 Topology 1 Transactions of the American Mathematical Society 1 International Journal of Algebra and Computation 1 Bulletin of the American Mathematical Society. New Series 1 Bulletin de la Société Mathématique de Belgique. Série A 1 Pattern Recognition Letters 1 Irish Mathematical Society Bulletin 1 Indagationes Mathematicae. New Series 1 Journal of Knot Theory and its Ramifications 1 Annales de la Faculté des Sciences de Toulouse. Mathématiques. Série VI 1 Georgian Mathematical Journal 1 Annals of Mathematics and Artificial Intelligence 1 Homology, Homotopy and Applications 1 Bulletin of the American Mathematical Society all top 5 Fields 79 Category theory; homological algebra (18-XX) 77 Algebraic topology (55-XX) 19 Group theory and generalizations (20-XX) 16 Manifolds and cell complexes (57-XX) 11 Associative rings and algebras (16-XX) 8 Computer science (68-XX) 6 Commutative algebra (13-XX) 6 General topology (54-XX) 5 General and overarching topics; collections (00-XX) 5 Quantum theory (81-XX) 3 \(K\)-theory (19-XX) 2 History and biography (01-XX) 2 Mathematical logic and foundations (03-XX) 2 Differential geometry (53-XX) 1 Combinatorics (05-XX) 1 Order, lattices, ordered algebraic structures (06-XX) 1 Algebraic geometry (14-XX) 1 Global analysis, analysis on manifolds (58-XX) 1 Mathematics education (97-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 89 Publications have been cited 625 times in 374 Documents Cited by ▼ Year ▼ Extensions, crossed modules and internal categories in categories of groups with operations. Zbl 0595.18006Porter, T. 47 1987 Abstract homotopy and simple homotopy theory. Zbl 0890.55014Kamps, K. H.; Porter, T. 31 1997 Shape theory: categorical methods of approximation. Zbl 0663.18001Cordier, J.-M.; Porter, T. 30 1989 Vogt’s theorem on categories of homotopy coherent diagrams. Zbl 0603.55017Cordier, Jean-Marc; Porter, Timothy 30 1986 \(n\)-types of simplicial groups and crossed \(n\)-cubes. Zbl 0776.55012Porter, Timothy 24 1993 Homotopy coherent category theory. Zbl 0865.18006Cordier, Jean-Marc; Porter, Timothy 22 1997 \(N\)-fold Čech derived functors and generalised Hopf type formulas. Zbl 1101.18008Donadze, Guram; Inassaridze, Nick; Porter, Timothy 21 2005 2-groupoid enrichments in homotopy theory and algebra. Zbl 1009.18007Kamps, K. H.; Porter, T. 17 2002 Some categorical results in the theory of crossed modules in commutative algebras. Zbl 0619.16033Porter, Timothy 16 1987 Homology of commutative algebras and an invariant of Simis and Vasconcelos. Zbl 0594.13011Porter, Timothy 15 1986 Cech and Steenrod homotopy and the Quigley exact couple in strong shape and proper homotopy theory. Zbl 0485.55009Porter, Timothy 14 1982 Cech homotopy. I. Zbl 0254.55012Porter, T. 14 1973 Stability results for topological spaces. Zbl 0275.55022Porter, Timothy 14 1974 Simplicial and crossed resolutions of commutative algebras. Zbl 0874.18010Arvasi, Z.; Porter, T. 13 1996 Coherent prohomotopy theory. Zbl 0387.55013Porter, Timothy 13 1978 Topological quantum field theories from homotopy \(n\)-types. Zbl 1097.57501Porter, Tim 12 1999 On Yetter’s invariant and an extension of the Dijkgraaf-Witten invariant to categorical groups. Zbl 1119.18009Martins, Joao Faria; Porter, Timothy 12 2007 Applications of Peiffer pairings in the Moore complex of a simplicial group. Zbl 0917.18006Mutlu, A.; Porter, T. 11 1998 A homotopy double groupoid of a Hausdorff space. Zbl 0986.18010Brown, Ronald; Hardie, Keith A.; Kamps, Klaus Heiner; Porter, Timothy 11 2002 Higher dimensional Peiffer elements in simplicial commutative algebras. Zbl 0874.18011Arvasi, Z.; Porter, T. 10 1997 Freeness conditions for 2-crossed modules and complexes. Zbl 0917.18004Mutlu, A.; Porter, T. 9 1998 Freeness conditions for 2-crossed modules of commutative algebras. Zbl 0923.18003Arvasi, Z.; Porter, T. 9 1998 Free and projective crossed modules and the second homology group of a group. Zbl 0584.20039Ellis, G. J.; Porter, T. 9 1986 Abstract homotopy theory in procategories. Zbl 0349.18012Porter, Timothy 9 1976 Iterated Peiffer pairings in the Moore complex of a simplicial group. Zbl 0991.18012Mutlu, A.; Porter, T. 8 2001 Coherent prohomotopical algebra. Zbl 0364.18009Porter, Timothy 7 1977 Maps between homotopy coherent diagrams. Zbl 0655.55008Cordier, Jean Marc; Porter, Timothy 6 1988 Global actions, groupoid atlases and applications. Zbl 1129.55009Bak, A.; Brown, R.; Minian, G.; Porter, T. 6 2006 Joins for (augmented) simplicial sets. Zbl 0951.18004Ehlers, P. J.; Porter, T. 6 2000 Spaces of maps into classifying spaces for equivariant crossed complexes. Zbl 0898.55009Brown, R.; Golasiński, M.; Porter, T.; Tonks, A. 6 1997 Varieties of simplicial groupoids. I: Crossed complexes. Zbl 0888.55005Ehlers, P. J.; Porter, T. 6 1997 Knots and surfaces. Zbl 0822.57001Gilbert, N. D.; Porter, T. 6 1994 Categorical models of \(n\)-types for pro-crossed complexes and \({\mathcal J_ n}\)-prospaces. Zbl 0752.55005Hernández, L. J.; Porter, T. 6 1992 Formal homotopy quantum field theories. I: Formal maps and crossed \(\mathcal{C}\)-algebras. Zbl 1205.57024Porter, Timothy; Turaev, Vladimir 6 2008 On the two definitions of Ho(pro C). Zbl 0647.18008Porter, Timothy 5 1988 Proper homotopy theory. Zbl 1004.55004Porter, Tim 5 1995 The kernels of completion maps and a relative form of Nakayama’s lemma. Zbl 0528.13026Porter, Timothy 5 1983 Interpretations of Yetter’s notion of \(G\)-coloring: Simplicial fibre bundles and non-abelian cohomology. Zbl 0893.55003Porter, Tim 5 1996 Knots and surfaces. Zbl 0828.57001Gilbert, N. D.; Porter, T. 5 1994 Shape theory. Categorical methods of approximation. Reprint of the 1989 original published by Ellis Horwood. Zbl 1243.18001Cordier, J.-M.; Porter, T. 5 2008 Fibrant diagrams, rectifications and a construction of Loday. Zbl 0715.55012Cordier, J.-M.; Porter, T. 5 1990 Crossed modules in Cat and Brown-Spencer theorem for 2-categories. Zbl 0575.18006Porter, Timothy 4 1985 A relative Jacobson radical with applications. Zbl 0583.16018Porter, T. 4 1985 Categorical aspects of equivariant homotopy. Zbl 0855.18009Cordier, Jean-Marc; Porter, Timothy 4 1996 On the Schreier theory of non-Abelian extensions: generalisations and computations. Zbl 0885.20018Brown, Ronald; Porter, Timothy 4 1996 Kähler categories. Zbl 1254.13026Blute, Richard; Cockett, J. R. B.; Porter, Timothy; Seely, R. A. G. 4 2011 The homotopy theory of inverse semigroups. Zbl 1050.55004Lawson, Mark V.; Matthews, Joseph; Porter, Tim 4 2002 Ordinal subdivision and special pasting in quasicategories. Zbl 1129.18003Ehlers, Philip John; Porter, Timothy 4 2008 Cech homotopy. II. Zbl 0257.55011Porter, T. 4 1973 Generalised shape theory. Zbl 0274.55011Porter, T. 4 1974 A Cech-Hurewicz isomorphism theorem for movable metric compacta. Zbl 0274.55014Porter, Tim 4 1973 Category theory: an abstract setting for analogy and comparison. Zbl 1235.18001Brown, Ronald; Porter, Timothy 3 2006 A homotopy double groupoid of a Hausdorff space. II: A van Kampen theorem. Zbl 1076.18004Brown, Ronald; Kamps, K. H.; Porter, Timothy 3 2005 Internal categories and crossed modules. Zbl 0499.18009Porter, Timothy 3 1982 Free crossed resolutions from simplicial resolutions with given CW-basis. Zbl 0947.18007Mutlu, A.; Porter, T. 3 1999 Spaces of maps into classifying spaces for equivariant crossed complexes. II: The general topological group case. Zbl 1012.55018Brown, R.; Golasiński, M.; Porter, T.; Tonks, A. 3 2001 Interpreted systems and Kripke models for multiagent systems from a categorical perspective. Zbl 1078.68146Porter, Timothy 3 2004 The coherent homotopy category over a fixed space is a category of fractions. Zbl 0751.55010Hardie, K. A.; Kamps, K. H.; Porter, T. 3 1991 Stability of algebraic inverse systems. I: Stability, weak stability and the weakly-stable socle. Zbl 0399.18004Porter, Timothy 3 1978 Introduction à la théorie de la forme. I. Zbl 0411.55007Cordier, J. M.; Porter, T. 3 1978 Essential properties of pro-objects in Grothendieck categories. Zbl 0414.18006Porter, Timothy 3 1979 Stability of algebraic inverse systems. II: Purity and localization. Zbl 0325.18009Porter, T. 3 1976 Abstract homotopy theory: the interaction of category theory and homotopy theory. Zbl 1369.55014Porter, Timothy 3 2003 Borsuk’s theory of shape and Cech homotopy. Zbl 0271.55010Porter, Tim 3 1973 A homotopy 2-groupoid from a fibration. Zbl 0914.55006Kamps, K. H.; Porter, T. 2 1999 Freeness conditions for crossed squares and squared complexes. Zbl 0983.18008Mutlu, A.; Porter, T. 2 2000 Pro-C completions of crossed modules. Zbl 0668.20027Korkes, F. J.; Porter, T. 2 1990 Proper pointed maps from \({\mathbb{R}}^{n+1}\) to a \(\sigma\)-compact space. Zbl 0669.55008Hernandez, Luis J.; Porter, Timothy 2 1988 Global analogues of the Brown-Grossman proper homotopy groups of an end. Zbl 0669.55009Hernandez, L. J.; Porter, T. 2 1988 Geometric aspects of multiagent systems. Zbl 1270.68221Porter, Timothy 2 2003 Crossed complexes, and free crossed resolutions for amalgamated sums and HNN-extensions of groups. Zbl 1030.55013Brown, R.; Moore, E. J.; Porter, T.; Wensley, C. D. 2 2002 Sur le théorème de Van Kampen et la construction de Vietoris. (On the Van Kampen theorem and the construction of Vietoris). Zbl 0234.55003Porter, Tim 2 1972 An embedding theorem for proper \(n\)-types. Zbl 0767.55007Hernández, Luis Javier; Porter, Timothy 2 1992 Une théorie des obstructions dans une categorie des diagrammes et des applications à la théorie d’homotopie de Cech. I. Zbl 0295.55008Porter, Timothy 2 1974 Erratum to: “Varieties of simplicial groupoids. I: Crossed complexes”. Zbl 0922.55006Ehlers, Philip John; Porter, Timothy 1 1999 Pattern recoginition and categorical shape theory. Zbl 0642.68145Cordier, J.-M.; Porter, T. 1 1988 Homotopy groups for strong shape and proper homotopy. Zbl 0568.55009Porter, Timothy 1 1984 Enriched categories and models for spaces of evolving states. Zbl 1148.18004Porter, Timothy 1 2008 A spatial view of information. Zbl 1118.68186Gratus, Jonathan; Porter, Timothy 1 2006 Reduced powers, ultrapowers and exactness of limits. Zbl 0506.18006Porter, Timothy 1 1982 Functors between shape categories. Zbl 0511.18013Cordier, Jean-Marc; Porter, Timothy 1 1983 The first derived equaliser of a pair of abelian group homomorphisms. Zbl 0251.20058Porter, Tim 1 1974 Coproduct of 2-crossed modules: applications to a definition of a tensor product for 2-crossed complexes. Zbl 1348.18008Carrasco, P.; Porter, T. 1 2016 Torsion theoretic results in procategories. III. Zbl 0355.18014Porter, T. 1 1976 Stability results for algebraic inverse systems. Zbl 0334.18020Porter, T. 1 1976 Quelques résultats sur les anneaux semi-noetheriens. Zbl 0341.16014Porter, Timothy 1 1976 Sur le type simple d’homotopie des groupoides. Zbl 0238.20075Porter, Tim 1 1972 Obstructions in shape theory. Zbl 0284.55018Porter, Tim 1 1974 Cech homotopy. III. Zbl 0288.55005Porter, T. 1 1974 Coproduct of 2-crossed modules: applications to a definition of a tensor product for 2-crossed complexes. Zbl 1348.18008Carrasco, P.; Porter, T. 1 2016 Kähler categories. Zbl 1254.13026Blute, Richard; Cockett, J. R. B.; Porter, Timothy; Seely, R. A. G. 4 2011 Formal homotopy quantum field theories. I: Formal maps and crossed \(\mathcal{C}\)-algebras. Zbl 1205.57024Porter, Timothy; Turaev, Vladimir 6 2008 Shape theory. Categorical methods of approximation. Reprint of the 1989 original published by Ellis Horwood. Zbl 1243.18001Cordier, J.-M.; Porter, T. 5 2008 Ordinal subdivision and special pasting in quasicategories. Zbl 1129.18003Ehlers, Philip John; Porter, Timothy 4 2008 Enriched categories and models for spaces of evolving states. Zbl 1148.18004Porter, Timothy 1 2008 On Yetter’s invariant and an extension of the Dijkgraaf-Witten invariant to categorical groups. Zbl 1119.18009Martins, Joao Faria; Porter, Timothy 12 2007 Global actions, groupoid atlases and applications. Zbl 1129.55009Bak, A.; Brown, R.; Minian, G.; Porter, T. 6 2006 Category theory: an abstract setting for analogy and comparison. Zbl 1235.18001Brown, Ronald; Porter, Timothy 3 2006 A spatial view of information. Zbl 1118.68186Gratus, Jonathan; Porter, Timothy 1 2006 \(N\)-fold Čech derived functors and generalised Hopf type formulas. Zbl 1101.18008Donadze, Guram; Inassaridze, Nick; Porter, Timothy 21 2005 A homotopy double groupoid of a Hausdorff space. II: A van Kampen theorem. Zbl 1076.18004Brown, Ronald; Kamps, K. H.; Porter, Timothy 3 2005 Interpreted systems and Kripke models for multiagent systems from a categorical perspective. Zbl 1078.68146Porter, Timothy 3 2004 Abstract homotopy theory: the interaction of category theory and homotopy theory. Zbl 1369.55014Porter, Timothy 3 2003 Geometric aspects of multiagent systems. Zbl 1270.68221Porter, Timothy 2 2003 2-groupoid enrichments in homotopy theory and algebra. Zbl 1009.18007Kamps, K. H.; Porter, T. 17 2002 A homotopy double groupoid of a Hausdorff space. Zbl 0986.18010Brown, Ronald; Hardie, Keith A.; Kamps, Klaus Heiner; Porter, Timothy 11 2002 The homotopy theory of inverse semigroups. Zbl 1050.55004Lawson, Mark V.; Matthews, Joseph; Porter, Tim 4 2002 Crossed complexes, and free crossed resolutions for amalgamated sums and HNN-extensions of groups. Zbl 1030.55013Brown, R.; Moore, E. J.; Porter, T.; Wensley, C. D. 2 2002 Iterated Peiffer pairings in the Moore complex of a simplicial group. Zbl 0991.18012Mutlu, A.; Porter, T. 8 2001 Spaces of maps into classifying spaces for equivariant crossed complexes. II: The general topological group case. Zbl 1012.55018Brown, R.; Golasiński, M.; Porter, T.; Tonks, A. 3 2001 Joins for (augmented) simplicial sets. Zbl 0951.18004Ehlers, P. J.; Porter, T. 6 2000 Freeness conditions for crossed squares and squared complexes. Zbl 0983.18008Mutlu, A.; Porter, T. 2 2000 Topological quantum field theories from homotopy \(n\)-types. Zbl 1097.57501Porter, Tim 12 1999 Free crossed resolutions from simplicial resolutions with given CW-basis. Zbl 0947.18007Mutlu, A.; Porter, T. 3 1999 A homotopy 2-groupoid from a fibration. Zbl 0914.55006Kamps, K. H.; Porter, T. 2 1999 Erratum to: “Varieties of simplicial groupoids. I: Crossed complexes”. Zbl 0922.55006Ehlers, Philip John; Porter, Timothy 1 1999 Applications of Peiffer pairings in the Moore complex of a simplicial group. Zbl 0917.18006Mutlu, A.; Porter, T. 11 1998 Freeness conditions for 2-crossed modules and complexes. Zbl 0917.18004Mutlu, A.; Porter, T. 9 1998 Freeness conditions for 2-crossed modules of commutative algebras. Zbl 0923.18003Arvasi, Z.; Porter, T. 9 1998 Abstract homotopy and simple homotopy theory. Zbl 0890.55014Kamps, K. H.; Porter, T. 31 1997 Homotopy coherent category theory. Zbl 0865.18006Cordier, Jean-Marc; Porter, Timothy 22 1997 Higher dimensional Peiffer elements in simplicial commutative algebras. Zbl 0874.18011Arvasi, Z.; Porter, T. 10 1997 Spaces of maps into classifying spaces for equivariant crossed complexes. Zbl 0898.55009Brown, R.; Golasiński, M.; Porter, T.; Tonks, A. 6 1997 Varieties of simplicial groupoids. I: Crossed complexes. Zbl 0888.55005Ehlers, P. J.; Porter, T. 6 1997 Simplicial and crossed resolutions of commutative algebras. Zbl 0874.18010Arvasi, Z.; Porter, T. 13 1996 Interpretations of Yetter’s notion of \(G\)-coloring: Simplicial fibre bundles and non-abelian cohomology. Zbl 0893.55003Porter, Tim 5 1996 Categorical aspects of equivariant homotopy. Zbl 0855.18009Cordier, Jean-Marc; Porter, Timothy 4 1996 On the Schreier theory of non-Abelian extensions: generalisations and computations. Zbl 0885.20018Brown, Ronald; Porter, Timothy 4 1996 Proper homotopy theory. Zbl 1004.55004Porter, Tim 5 1995 Knots and surfaces. Zbl 0822.57001Gilbert, N. D.; Porter, T. 6 1994 Knots and surfaces. Zbl 0828.57001Gilbert, N. D.; Porter, T. 5 1994 \(n\)-types of simplicial groups and crossed \(n\)-cubes. Zbl 0776.55012Porter, Timothy 24 1993 Categorical models of \(n\)-types for pro-crossed complexes and \({\mathcal J_ n}\)-prospaces. Zbl 0752.55005Hernández, L. J.; Porter, T. 6 1992 An embedding theorem for proper \(n\)-types. Zbl 0767.55007Hernández, Luis Javier; Porter, Timothy 2 1992 The coherent homotopy category over a fixed space is a category of fractions. Zbl 0751.55010Hardie, K. A.; Kamps, K. H.; Porter, T. 3 1991 Fibrant diagrams, rectifications and a construction of Loday. Zbl 0715.55012Cordier, J.-M.; Porter, T. 5 1990 Pro-C completions of crossed modules. Zbl 0668.20027Korkes, F. J.; Porter, T. 2 1990 Shape theory: categorical methods of approximation. Zbl 0663.18001Cordier, J.-M.; Porter, T. 30 1989 Maps between homotopy coherent diagrams. Zbl 0655.55008Cordier, Jean Marc; Porter, Timothy 6 1988 On the two definitions of Ho(pro C). Zbl 0647.18008Porter, Timothy 5 1988 Proper pointed maps from \({\mathbb{R}}^{n+1}\) to a \(\sigma\)-compact space. Zbl 0669.55008Hernandez, Luis J.; Porter, Timothy 2 1988 Global analogues of the Brown-Grossman proper homotopy groups of an end. Zbl 0669.55009Hernandez, L. J.; Porter, T. 2 1988 Pattern recoginition and categorical shape theory. Zbl 0642.68145Cordier, J.-M.; Porter, T. 1 1988 Extensions, crossed modules and internal categories in categories of groups with operations. Zbl 0595.18006Porter, T. 47 1987 Some categorical results in the theory of crossed modules in commutative algebras. Zbl 0619.16033Porter, Timothy 16 1987 Vogt’s theorem on categories of homotopy coherent diagrams. Zbl 0603.55017Cordier, Jean-Marc; Porter, Timothy 30 1986 Homology of commutative algebras and an invariant of Simis and Vasconcelos. Zbl 0594.13011Porter, Timothy 15 1986 Free and projective crossed modules and the second homology group of a group. Zbl 0584.20039Ellis, G. J.; Porter, T. 9 1986 Crossed modules in Cat and Brown-Spencer theorem for 2-categories. Zbl 0575.18006Porter, Timothy 4 1985 A relative Jacobson radical with applications. Zbl 0583.16018Porter, T. 4 1985 Homotopy groups for strong shape and proper homotopy. Zbl 0568.55009Porter, Timothy 1 1984 The kernels of completion maps and a relative form of Nakayama’s lemma. Zbl 0528.13026Porter, Timothy 5 1983 Functors between shape categories. Zbl 0511.18013Cordier, Jean-Marc; Porter, Timothy 1 1983 Cech and Steenrod homotopy and the Quigley exact couple in strong shape and proper homotopy theory. Zbl 0485.55009Porter, Timothy 14 1982 Internal categories and crossed modules. Zbl 0499.18009Porter, Timothy 3 1982 Reduced powers, ultrapowers and exactness of limits. Zbl 0506.18006Porter, Timothy 1 1982 Essential properties of pro-objects in Grothendieck categories. Zbl 0414.18006Porter, Timothy 3 1979 Coherent prohomotopy theory. Zbl 0387.55013Porter, Timothy 13 1978 Stability of algebraic inverse systems. I: Stability, weak stability and the weakly-stable socle. Zbl 0399.18004Porter, Timothy 3 1978 Introduction à la théorie de la forme. I. Zbl 0411.55007Cordier, J. M.; Porter, T. 3 1978 Coherent prohomotopical algebra. Zbl 0364.18009Porter, Timothy 7 1977 Abstract homotopy theory in procategories. Zbl 0349.18012Porter, Timothy 9 1976 Stability of algebraic inverse systems. II: Purity and localization. Zbl 0325.18009Porter, T. 3 1976 Torsion theoretic results in procategories. III. Zbl 0355.18014Porter, T. 1 1976 Stability results for algebraic inverse systems. Zbl 0334.18020Porter, T. 1 1976 Quelques résultats sur les anneaux semi-noetheriens. Zbl 0341.16014Porter, Timothy 1 1976 Stability results for topological spaces. Zbl 0275.55022Porter, Timothy 14 1974 Generalised shape theory. Zbl 0274.55011Porter, T. 4 1974 Une théorie des obstructions dans une categorie des diagrammes et des applications à la théorie d’homotopie de Cech. I. Zbl 0295.55008Porter, Timothy 2 1974 The first derived equaliser of a pair of abelian group homomorphisms. Zbl 0251.20058Porter, Tim 1 1974 Obstructions in shape theory. Zbl 0284.55018Porter, Tim 1 1974 Cech homotopy. III. Zbl 0288.55005Porter, T. 1 1974 Cech homotopy. I. Zbl 0254.55012Porter, T. 14 1973 Cech homotopy. II. Zbl 0257.55011Porter, T. 4 1973 A Cech-Hurewicz isomorphism theorem for movable metric compacta. Zbl 0274.55014Porter, Tim 4 1973 Borsuk’s theory of shape and Cech homotopy. Zbl 0271.55010Porter, Tim 3 1973 Sur le théorème de Van Kampen et la construction de Vietoris. (On the Van Kampen theorem and the construction of Vietoris). Zbl 0234.55003Porter, Tim 2 1972 Sur le type simple d’homotopie des groupoides. Zbl 0238.20075Porter, Tim 1 1972 all cited Publications top 5 cited Publications all top 5 Cited by 345 Authors 38 Porter, Timothy 17 Hernández Paricio, Luis Javier 15 Ladra González, Manuel 13 Casas Miras, José Manuel 10 Cordier, Jean-Marc 10 Datuashvili, Tamar 10 Martins, João Nuno Goncalves Faria 10 Mucuk, Osman 9 Şahan, Tunçar 9 Sanjurjo, José M. R. 9 Ulualan, Erdal 8 Stramaccia, Luciano 7 Rivas Rodríguez, María Teresa 7 van der Linden, Tim 6 Ellis, Graham J. 6 Khmaladze, Emzar 5 Blanc, David Abraham 5 Donadze, Guram 5 Everaert, Tomas 5 García-Martínez, Xabier 5 Gran, Marino 5 Inassaridze, Nikoloz 5 Martins-Ferreira, Nelson 5 Montoli, Andrea 5 Temel, Sedat 4 Alp, Murat 4 Avcioǧlu, Osman 4 Baues, Hans-Joachim 4 Brown, Ronald 4 Emir, Kadir 4 Extremiana Aldana, José Ignacio 4 Giraldo, Antonio 4 Golasiński, Marek 4 Gómez Pardo, José Luis 4 Goubault, Eric 4 Hardie, Keith A. 4 Kamps, Klaus Heiner 4 Paoli, Simona 4 Picken, Roger F. 4 Sobral, Manuela 3 Alemdar, Nazmiye 3 Arvasi, Zekeriya 3 Bourn, Dominique 3 Cegarra, Antonio Martínez 3 Cockett, J. Robin B. 3 García-Calcines, Jose Manuel 3 Grandis, Marco 3 Kholodenko, Arkady L. 3 Lemay, Jean-Simon P. 3 Mikhaĭlov, Roman Valer’evich 3 Odabaş, Alper 3 Riehl, Emily 2 Akça, Ibrahim Ilker 2 Akız, Hürmet Fulya 2 Atik, Hasan 2 Barge Yáñez, Héctor 2 Batanin, Mikhail A. 2 Bergner, Julie 2 Blute, Richard F. 2 Bochniak, Arkadiusz 2 Böhm, Gabriella 2 Bullivant, Alex 2 Chatterjee, Saikat 2 Cigoli, Alan S. 2 Cirici, Joana 2 Conduché, Daniel 2 Davvaz, Bijan 2 Dehghani, Mohammad Ali 2 Delcamp, Clement 2 Dugger, Daniel 2 Edwards, David A. 2 Ehlers, Philip John 2 Elvira-Donazar, Carmen 2 Fernández-Casado, Rafael 2 García Cabello, Julia 2 García Hernández, José Luis 2 García Pinillos, Mónica 2 Garzón, Antonio R. 2 Gaucher, Philippe 2 Geoghegan, Ross 2 Goedecke, Julia 2 Guitart, René 2 Gursoy, Mustafa Habil 2 Hadasz, Leszek 2 Hastings, Harold M. 2 Haugseng, Rune 2 İçen, İlhan 2 Janelidze, George 2 Jurčo, Branislav 2 Krishnan, Sanjeevi 2 Ledent, Jérémy 2 Metere, Giuseppe 2 Minian, Elias Gabriel 2 Moerdijk, Ieke 2 Moron, Manuel Alonso 2 Muro, Fernando 2 Mutlu, Ali Yener 2 Ozornova, Viktoriya 2 Pfeiffer, Hendryk 2 Rajsbaum, Sergio ...and 245 more Authors all top 5 Cited in 102 Serials 38 Journal of Pure and Applied Algebra 28 Topology and its Applications 28 Applied Categorical Structures 21 Cahiers de Topologie et Géométrie Différentielle Catégoriques 18 Advances in Mathematics 12 Communications in Algebra 12 Journal of Algebra 10 Journal of Geometry and Physics 10 Transactions of the American Mathematical Society 10 Journal of Homotopy and Related Structures 8 Cahiers de Topologie et Géométrie Différentielle Catégoriques 7 Mathematical Proceedings of the Cambridge Philosophical Society 7 Theory and Applications of Categories 5 Mathematische Zeitschrift 5 Turkish Journal of Mathematics 5 Georgian Mathematical Journal 5 Algebraic & Geometric Topology 5 Hacettepe Journal of Mathematics and Statistics 5 Journal of Algebra and its Applications 4 Proceedings of the American Mathematical Society 4 Proceedings of the Edinburgh Mathematical Society. Series II 4 Journal of Knot Theory and its Ramifications 4 Journal of High Energy Physics 3 Journal of Mathematical Physics 3 Journal of Differential Equations 3 Journal of Soviet Mathematics 3 Semigroup Forum 3 Theoretical Computer Science 3 International Journal of Algebra and Computation 3 Journal of Mathematical Sciences (New York) 3 Filomat 3 Communications de la Faculté des Sciences de l’Université d’Ankara. Séries A1. Mathematics and Statistics 2 Israel Journal of Mathematics 2 Letters in Mathematical Physics 2 Glasgow Mathematical Journal 2 \(K\)-Theory 2 Differential Geometry and its Applications 2 Annales de la Faculté des Sciences de Toulouse. Mathématiques. Série VI 2 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 2 Central European Journal of Mathematics 2 Boletim da Sociedade Paranaense de Matemática. Terceira Série 2 International Journal of Geometric Methods in Modern Physics 2 Tbilisi Mathematical Journal 2 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 2 Korean Journal of Mathematics 1 Bulletin of the Australian Mathematical Society 1 Journal of Mathematical Analysis and Applications 1 Journal of Statistical Physics 1 Physica A 1 Reviews in Mathematical Physics 1 Fortschritte der Physik 1 Annales de l’Institut Fourier 1 Applied Mathematics and Computation 1 Bulletin de la Société Mathématique de France 1 Collectanea Mathematica 1 Commentationes Mathematicae Universitatis Carolinae 1 Journal of Computer and System Sciences 1 Manuscripta Mathematica 1 Mathematische Nachrichten 1 Quaestiones Mathematicae 1 Rendiconti del Circolo Matemàtico di Palermo. Serie II 1 Siberian Mathematical Journal 1 European Journal of Combinatorics 1 Order 1 Information and Computation 1 Forum Mathematicum 1 MSCS. Mathematical Structures in Computer Science 1 Games and Economic Behavior 1 Glasnik Matematički. Serija III 1 Bulletin of the American Mathematical Society. New Series 1 Indagationes Mathematicae. New Series 1 Topology Proceedings 1 Algebra Colloquium 1 Annals of Mathematics and Artificial Intelligence 1 Documenta Mathematica 1 Abstract and Applied Analysis 1 Soft Computing 1 Journal of Group Theory 1 Revista Matemática Complutense 1 LMS Journal of Computation and Mathematics 1 Acta Mathematica Sinica. English Series 1 Comptes Rendus. Mathématique. Académie des Sciences, Paris 1 Journal of the Institute of Mathematics of Jussieu 1 Bulletin of the American Mathematical Society 1 Proceedings of the Japan Academy 1 Proceedings of the Steklov Institute of Mathematics 1 Journal of Fixed Point Theory and Applications 1 Journal of Noncommutative Geometry 1 Journal of Topology 1 European Journal of Pure and Applied Mathematics 1 Journal of \(K\)-Theory 1 São Paulo Journal of Mathematical Sciences 1 Applied General Topology 1 Analysis and Mathematical Physics 1 Journal of Mathematical Extension 1 ISRN Geometry 1 Forum of Mathematics, Sigma 1 Mathematical Sciences 1 International Journal of Advances in Applied Mathematics and Mechanics 1 Transactions of the American Mathematical Society. Series B ...and 2 more Serials all top 5 Cited in 42 Fields 230 Category theory; homological algebra (18-XX) 178 Algebraic topology (55-XX) 66 Group theory and generalizations (20-XX) 41 Manifolds and cell complexes (57-XX) 38 Associative rings and algebras (16-XX) 33 General topology (54-XX) 29 Nonassociative rings and algebras (17-XX) 18 Quantum theory (81-XX) 17 Differential geometry (53-XX) 15 Topological groups, Lie groups (22-XX) 15 Computer science (68-XX) 13 Dynamical systems and ergodic theory (37-XX) 11 General algebraic systems (08-XX) 10 Mathematical logic and foundations (03-XX) 7 Order, lattices, ordered algebraic structures (06-XX) 7 \(K\)-theory (19-XX) 4 Commutative algebra (13-XX) 4 Algebraic geometry (14-XX) 4 Biology and other natural sciences (92-XX) 3 General and overarching topics; collections (00-XX) 3 Global analysis, analysis on manifolds (58-XX) 3 Mechanics of particles and systems (70-XX) 2 History and biography (01-XX) 2 Combinatorics (05-XX) 2 Number theory (11-XX) 2 Several complex variables and analytic spaces (32-XX) 2 Partial differential equations (35-XX) 2 Functional analysis (46-XX) 2 Probability theory and stochastic processes (60-XX) 2 Optics, electromagnetic theory (78-XX) 2 Statistical mechanics, structure of matter (82-XX) 2 Relativity and gravitational theory (83-XX) 2 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 1 Field theory and polynomials (12-XX) 1 Measure and integration (28-XX) 1 Sequences, series, summability (40-XX) 1 Approximations and expansions (41-XX) 1 Geometry (51-XX) 1 Statistics (62-XX) 1 Fluid mechanics (76-XX) 1 Systems theory; control (93-XX) 1 Mathematics education (97-XX) Citations by Year