Not signed in (Sign In)

Not signed in

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

  • Sign in using OpenID

Site Tag Cloud

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

Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to nForum
If you want to take part in these discussions either sign in now (if you have an account), apply for one now (if you don't).
  1. Fixup description of birkhoff duality. Add small section on free distributive lattices.

    Gershom

    diff, v19, current

  2. A bit more description of birkoff duality and yoneda.

    Gershom

    diff, v19, current

    • CommentRowNumber3.
    • CommentAuthorTodd_Trimble
    • CommentTimeMar 31st 2020

    Hm, I’ll have to come back to this. I don’t like the erasure of “baby form of” (Birkhoff duality) – the finite form of the duality not being full-fledged “adult” Birkhoff duality – but perhaps “finite” or “finitistic” instead of “baby” and you’d be happy?

    There is at least one more strikeout whose appropriateness I’d have to consider when I have more time.

    • CommentRowNumber4.
    • CommentAuthorJohn Baez
    • CommentTimeMar 31st 2020

    Some corrections by me, and some additions by someone else, which look generally to be improvements.

    diff, v22, current

  3. Added that one direction of each distributivity law holds in any lattice.

    Greg Price

    diff, v24, current

    • CommentRowNumber6.
    • CommentAuthorgregprice
    • CommentTimeJul 22nd 2022

    Added link to OEIS entry for the Dedekind numbers.

    diff, v25, current

  4. A new Dedekind number was calculated in 2023.

    Abel Jansma

    diff, v26, current

  5. The two exponentials in a bi-Heyting algebra are not necessarily equal.

    Geoffrey Trang

    diff, v28, current