Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

• Username
• Password
• Remember me

• Sign in using OpenID
• Remember me

• Forgot your password?
• Apply for membership

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis 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 index-theory integration integration-theory internal-categories k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting 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 scheme schemes set set-theory sheaf simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

1. • CommentRowNumber1.
   • CommentAuthorTobyBartels
   • CommentTimeAug 29th 2015
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexIt\'s really the reflection of topological spaces within a larger category, but usually people think of it as underlying: [[underlying topological space]].

   It's really the reflection of topological spaces within a larger category, but usually people think of it as underlying: underlying topological space.

2. • CommentRowNumber2.
   • CommentAuthorTodd_Trimble
   • CommentTimeAug 29th 2015
   • PermaLink
   Author: Todd_Trimble
   Format: MarkdownItexWhere you say 'point' in the article, should there be some understanding that such points induce points of the frame $\mathcal{O}$, i.e., there is an assigned function ${|X|} \to \hom_{Frame}(\mathcal{O}, \mathbf{2})$ from points in the underlying set to frame maps?

   Where you say ’point’ in the article, should there be some understanding that such points induce points of the frame $\mathcal{O}$, i.e., there is an assigned function ${|X|} \to \hom_{Frame}(\mathcal{O}, \mathbf{2})$ from points in the underlying set to frame maps?

3. • CommentRowNumber3.
   • CommentAuthorTobyBartels
   • CommentTimeAug 29th 2015
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexRight, that\'s supposed to be implied by the phrase ‘frame of open sub*set*s’. That is, the frame is a subframe of the powerset of the set of points.

   Right, that's supposed to be implied by the phrase ‘frame of open subsets’. That is, the frame is a subframe of the powerset of the set of points.

4. • CommentRowNumber4.
   • CommentAuthorTodd_Trimble
   • CommentTimeAug 30th 2015
   • PermaLink
   Author: Todd_Trimble
   Format: MarkdownItexThanks. I went ahead and added that in.

   Thanks. I went ahead and added that in.