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Crossed module
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21	Crossed complexes and chain complexes with operators∗ by RONALD BROWN School of Mathematics, University College of North Wales, Bangor, Gwynedd LL57 1UT PHILIP J. HIGGINS Department of Mathematical Sciences, University Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2008-04-04 03:58:11 Homotopy theory Category theory Algebraic topology Group theory Group actions Groupoid Category Adjoint functors Crossed module Abstract algebra Algebra Mathematics
22	ON THE SCHREIER THEORY OF NONABELIAN EXTENSIONS: GENERALISATIONS AND COMPUTATIONS Ronald Brown and Timothy Porter School of Mathematics University of Wales, Bangor Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2003-03-19 12:46:48 Homological algebra Algebraic topology Group theory Morphisms Crossed module Epimorphism G-module Kernel Image Abstract algebra Algebra Category theory
23	Intuitions for cubical methods in nonabelian algebraic topology Ronnie Brown IHP, Paris, June 5, 2014 CONSTRUCTIVE MATHEMATICS AND MODELS OF TYPE Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2014-06-08 07:12:18 Homotopy theory Category theory Algebraic topology Higher category theory Algebraic structures Seifert–van Kampen theorem Double groupoid Groupoid Crossed module Abstract algebra Topology Mathematics
24	Homotopy theory, and change of base for groupoids and multiple groupoids∗† Ronald Brown March 6, 2007 Abstract Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2007-03-06 17:03:14 Homotopy theory Category theory Higher category theory Algebraic topology Algebraic structures Double groupoid Groupoid Seifert–van Kampen theorem Crossed module Abstract algebra Mathematics Topology
25	Graphs of Groups: Word Computations and Free Crossed Resolutions Emma Jane Moore November 2000 Summary Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2008-03-17 08:32:10 Homotopy theory Algebraic topology Category theory Geometric group theory Algebraic structures Groupoid Crossed module Fundamental group Graph of groups Abstract algebra Mathematics Algebra
26	J. Symbolic Computation[removed], 1–13 doi:[removed]jsco[removed]Available online at http://www.idealibrary.com on Computation and Homotopical Applications of Induced Crossed Modules Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2007-03-14 19:06:11 Algebraic topology Homological algebra Algebraic structures Group theory Crossed module Group cohomology Hurewicz theorem Homotopy group Adjoint functors Abstract algebra Algebra Homotopy theory
27	Homology, Homotopy and Applications, vol. 10(1), 2008, pp.1–17 A NEW HIGHER HOMOTOPY GROUPOID: THE FUNDAMENTAL GLOBULAR ω-GROUPOID OF A FILTERED SPACE RONALD BROWN Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2008-03-29 17:33:10 Mathematics Seifert–van Kampen theorem Crossed module Groupoid Homotopy group Hurewicz theorem Ronald Brown 2-group Fundamental group Abstract algebra Topology Homotopy theory
28	Journal of Homotopy and Related Structures, vol. 1(1), 2006, pp.1–12 EXACT SEQUENCES OF FIBRATIONS OF CROSSED COMPLEXES, HOMOTOPY CLASSIFICATION OF MAPS, AND NONABELIAN EXTENSIONS OF GROUPS Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2008-06-25 03:44:35 Algebraic topology Category theory Homology theory Crossed module Groupoid Homotopy group Model category Weak equivalence Homotopy lifting property Topology Homotopy theory Abstract algebra
29	Homology, Homotopy and Applications, vol. 10(1), 2008, pp.327–343 A NEW HIGHER HOMOTOPY GROUPOID: Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2008-04-19 01:30:31 Mathematics Seifert–van Kampen theorem Crossed module Groupoid Homotopy group Hurewicz theorem Ronald Brown 2-group Fundamental group Abstract algebra Topology Homotopy theory
30	ON THE CONNECTION BETWEEN THE SECOND RELATIVE HOMOTOPY GROUPS OF SOME RELATED SPACES Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2008-03-06 07:26:59 Mathematics Groupoid Homotopy group Double groupoid Crossed module Fundamental group Homotopy Group action Path Abstract algebra Homotopy theory Topology

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