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A comparison between the fundamental groupoid and the fundamental group

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#general-topology #algebraic-topology #examples-counterexamples #groupoids
436
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Two definitions of equivariant sheaves

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#lie-groups #sheaf-theory #group-actions #simplicial-stuff #groupoids
195
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Is a groupoid a universal algebra?

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#abstract-algebra #groupoids
816
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Statement about Homotopy in Brown's "Topology & Groupoids"

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#general-topology #algebraic-topology #homotopy-theory #groupoids
192
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Should the first be the last by composition of paths?

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#algebraic-topology #category-theory #homotopy-theory #groupoids
773
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Where to get help with Homotopy type theory?

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#homotopy-theory #groupoids #homotopy-type-theory
663
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Which of these constructions are left adjoints?

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#category-theory #order-theory #monoid #groupoids
142
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Torsors for 2-groups

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#homotopy-theory #higher-category-theory #groupoids
118
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Groupoid-valued presheaf as a colimit of representables

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#category-theory #groupoids
349
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Why is a groupoid required to be a small category?

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#reference-request #category-theory #groupoids
59
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Gleason Yamabe for groupoids

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#lie-groups #groupoids #lie-groupoids
88
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tensor product and loop space multiplication are homotopic on $\mathbb{P}^\infty$

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#algebraic-topology #homotopy-theory #vector-bundles #characteristic-classes #groupoids
437
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Can a groupoid with at least two objects have a group structure(in a pathological way, if necessary)?

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#abstract-algebra #category-theory #groupoids
112
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"Finite flat" vs. "finite locally free" groupoids

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#algebraic-geometry #groupoids
719
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Is the Subcategory of Infinite Sets a Groupoid?

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#category-theory #infinity #groupoids

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