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2-category 2-category-theory abelian-categories accessible adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry beauty bundles calculus categories category category-theory chern-weil-theory cobordism-theory cohesion cohesive-homotopy-theory cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive constructive-mathematics cosmology deformation-theory derived-geometry descent differential differential-cohomology differential-geometry duality education elliptic-cohomology enriched factorization-system fibration foundations functional-analysis functor galois-theory gauge-theory gebra general topology geometric-quantization geometry goodwillie-calculus graph gravity group-theory higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory hypercovers index-theory infinity integration-theory k-theory kan lie-theory limit limits linear linear-algebra locale localization logic manifolds mathematics measure-theory modal-logic model model-category-theory model-theory monoidal monoidal-category-theory morphism motives motivic-cohomology newpage nforum nonassociative noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry set set-theory sheaf simplicial space spin-geometry stable-homotopy-theory stack string string-theory subobject superalgebra supergeometry symplectic-geometry synthetic-differential-geometry terminology theory topological topology topos topos-theory tqft type type-theory universal web

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- Discussion Type
- discussion topicUrysohn's lemma
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- Started by Urs
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- discussion topicZariski topology
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- Discussion Type
- discussion topicpartitions of unity and locally finite cover
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- discussion topicparacompact Hausdorff spaces are normal
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- Discussion Type
- discussion topicseparation axiom
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- Comments 22
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- Discussion Type
- discussion topicparacompact Hausdorff spaces equivalently admit subordinate partitions of unity
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- Discussion Type
- discussion topicHomotopical algebra is not concrete
- Category Preprints & Publications
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- Category Mathematics, Physics & Philosophy
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- Discussion Type
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- discussion topictopological invariance of dimension
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- Comments 28
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- Discussion Type
- discussion topicgeometric realization of categories and Quillen's theorems A and B
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- Discussion Type
- discussion topicschemes are sober
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- Discussion Type
- discussion topicmaximal ideal
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- Comments 19
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- Comments 37
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- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 2
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- discussion topicalternative algebra
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- discussion topicobjects of finite type (terminology)
- Category Mathematics, Physics & Philosophy
- Started by Alain BruguiÃ¨res
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- discussion topicanalysis
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- discussion topicfinite intersection property
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- discussion topicempty set
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- discussion topicCW-complex
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- Started by Urs
- Comments 25
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- Last Active Apr 21st 2017