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Definition of equivalence of topological groupoids and cohomology of groupoids

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#reference-request #homotopy-theory #groupoids
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Characterization of the Predual of a von Neumann Algebra

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#functional-analysis #operator-algebras #von-neumann-algebras #groupoids
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The Seifert-Van Kampen theorem as a push-out

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#general-topology #category-theory #homotopy-theory #fundamental-groups #groupoids
92
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Fundamental groupoids is a embedding of category $Cov(B)\to Cov(\Pi(B))$

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#general-topology #algebraic-topology #groupoids
123
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Local bisections of Lie groupoids

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#general-topology #differential-topology #groupoids
134
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Isomorphism of Principal Bundles with structure groupoid

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#lie-groups #principal-bundles #groupoids
196
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Is the Groupoid of germs associated to an orbifold a Hausdorff proper Lie groupoid?

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#category-theory #lie-groups #groupoids #orbifolds
313
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Fundamental groupoid of a contractible space

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#algebraic-topology #homotopy-theory #groupoids
325
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van Kampen theorem for fundamental groupoid of $X$ relative to $A$

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#algebraic-topology #fundamental-groups #groupoids
291
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Why should the source and the target map of a Lie groupoid be submersions?

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#differential-topology #groupoids
92
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Ref. Request -- Non-Transitive Lie Group Actions, Applications to Orbifolds/Groupoids

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#reference-request #lie-groups #group-actions #groupoids #orbifolds
53
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coherence of inverses in 2-groupoids

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#category-theory #higher-category-theory #groupoids
248
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Conjugacy Class of Isomorphisms Between Two Isomorphic Groups Definition

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#algebraic-topology #category-theory #groupoids
279
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Groupoid element with multiple inverse elements?

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#inverse #groupoids
412
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Universal covering and double cover functors

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#general-topology #algebraic-topology #category-theory #covering-spaces #groupoids

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