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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 definitions 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 k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nforum 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.
   • CommentAuthoratmacen
   • CommentTimeSep 12th 2019
   • (edited Sep 12th 2019)
   • PermaLink
   Author: atmacen
   Format: MarkdownItexThat term intro rule was probably all wrong (edit: thanks go to GuiGeek [here](https://nforum.ncatlab.org/discussion/10314/dependent-sum-type/?Focus=80036#Comment_80036)). Also tried to consistently rename A => B, X => A. <a href="https://ncatlab.org/nlab/revision/diff/dependent+sum+natural+deduction+-+table/11">diff</a>, <a href="https://ncatlab.org/nlab/revision/dependent+sum+natural+deduction+-+table/11">v11</a>, <a href="https://ncatlab.org/nlab/show/dependent+sum+natural+deduction+-+table">current</a>

   That term intro rule was probably all wrong (edit: thanks go to GuiGeek here). Also tried to consistently rename A => B, X => A.

   diff, v11, current

2. • CommentRowNumber2.
   • CommentAuthoratmacen
   • CommentTimeSep 12th 2019
   • PermaLink
   Author: atmacen
   Format: MarkdownItexOh, there's [another thread](https://nforum.ncatlab.org/discussion/7162/) about this include.

   Oh, there’s another thread about this include.

3. • CommentRowNumber3.
   • CommentAuthorUrs
   • CommentTimeFeb 15th 2023
   • PermaLink
   Author: Urs
   Format: MarkdownItexhave replaced the hack-of-a-table that used to be here with a `tikz`ed up enhancement. <a href="https://ncatlab.org/nlab/revision/diff/dependent+sum+natural+deduction+-+table/12">diff</a>, <a href="https://ncatlab.org/nlab/revision/dependent+sum+natural+deduction+-+table/12">v12</a>, <a href="https://ncatlab.org/nlab/show/dependent+sum+natural+deduction+-+table">current</a>

   have replaced the hack-of-a-table that used to be here with a tikzed up enhancement.

   diff, v12, current