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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 2014
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexOn <http://ncatlab.org/nlab/list/empty>, there should be a list of pages in `category:empty`, but nothing comes up. This is what happens if you try to list an empty category, but the category is not empty; for example, [[empty 000]] belongs to it. You will see links to all of the other category lists; `category:empty` itself should also appear but doesn\'t. But if you follow them, then you\'ll see how they work. Another category that exists but appears empty is `category: type theory`. I don\'t know if there are any more.

   On http://ncatlab.org/nlab/list/empty, there should be a list of pages in category:empty, but nothing comes up. This is what happens if you try to list an empty category, but the category is not empty; for example, empty 000 belongs to it.

   You will see links to all of the other category lists; category:empty itself should also appear but doesn't. But if you follow them, then you'll see how they work.

   Another category that exists but appears empty is category: type theory. I don't know if there are any more.

2. • CommentRowNumber2.
   • CommentAuthoradeelkh
   • CommentTimeAug 29th 2014
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   Author: adeelkh
   Format: MarkdownItexI assume this is an Instiki bug so I'll report it to Jacques.

   I assume this is an Instiki bug so I’ll report it to Jacques.