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Seifert–van Kampen theorem
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21	The Seifert-van Kampen Theorem for the fundamental groupoid of a space with a set of base points This note is an extract for the convenience of readers of a section of the book [BHS11], with some additional comments. Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2014-04-10 13:42:56 Algebra Category theory Higher category theory Algebraic structures Algebraic topology Double groupoid Seifert–van Kampen theorem Groupoid Pushout Abstract algebra Mathematics Homotopy theory
22	Journal of Homotopy and Related Structures, vol. 1(1), 2006, pp.175–183 GROUPOIDS, THE PHRAGMEN-BROUWER PROPERTY, AND THE JORDAN CURVE THEOREM RONALD BROWN (communicated by Frederick Cohen) Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2007-12-16 10:48:42 Mathematics Seifert–van Kampen theorem Groupoid Covering space Fundamental group Pushout Group action Path Jordan curve theorem Abstract algebra Topology Homotopy theory
23	Groups, groupoids and higher groupoids in algebraic topology An area of mathematics in which nonabelian structures have proved important is algebraic topology, where the fundamental group π1 (X, a) of a space X at a bas Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2010-12-20 11:50:11 Homotopy theory Category theory Higher category theory Algebraic topology Algebraic structures Double groupoid Seifert–van Kampen theorem Higher-dimensional algebra Homotopy group 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	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
26	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
27	Applications of higher order Seifert–van Kampen Theorems for structured spaces Ronald Brown Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2012-07-10 13:14:18 Mathematics Algebraic topology Category theory Higher category theory Homology theory Homotopy group Ronald Brown Hurewicz theorem Seifert–van Kampen theorem Topology Abstract algebra Homotopy theory
28	My tribute to Jean-Louis Loday Ronnie Brown July, 2012 www.bangor.ac.uk/r.brown Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2012-07-29 06:54:16 Homotopy theory Hurewicz theorem Cyclic homology Seifert–van Kampen theorem Homotopy group Crossed module Homology Ronald Brown Künneth theorem Abstract algebra Topology Algebraic topology
29	FROM GROUPS TO GROUPOIDS: A BRIEF SURVEY ∗ RONALD BROWN Add to Reading List Source URL: pages.bangor.ac.uk Language: English - Date: 2012-04-02 11:09:15 Homotopy theory Category theory Algebraic topology Group theory Higher category theory Groupoid Seifert–van Kampen theorem Double groupoid Group action Abstract algebra Mathematics Algebra
30	Theory and Applications of Categories, Vol. 14, No. 9, 2005, pp. 200–220. A HOMOTOPY DOUBLE GROUPOID OF A HAUSDORFF SPACE II: Add to Reading List Source URL: www.emis.de Language: English - Date: 2005-06-19 12:29:32 Category theory Higher category theory Algebraic topology Algebraic structures Double groupoid Seifert–van Kampen theorem Groupoid Homotopy group Directed algebraic topology Abstract algebra Homotopy theory Mathematics

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