Not signed in (Sign In)

A discussion forum about contributions to the nLab wiki and related areas of mathematics, physics, and philosophy.

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

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry beauty bundles calculus categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics comma complex complex-geometry computable-mathematics computer-science constructive constructive-mathematics cosmology definitions deformation-theory descent diagrams differential differential-cohomology differential-geometry differential-topology digraphs duality elliptic-cohomology enriched fibration finite foundations functional-analysis functor galois-theory gauge-theory gebra geometric-quantization geometry goodwillie-calculus graph graphs 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 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 monoidal monoidal-category-theory morphism motives motivic-cohomology newpage nonassociative noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pasting philosophy physics planar 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 subobject superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal

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

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).

- Discussion Type
- discussion topicdirected graph
- Category Mathematics, Physics & Philosophy
- Started by Eric
- Comments 40
- Last comment by Peter Heinig
- Last Active 2 hours ago

- Discussion Type
- discussion topicBase change for straightening
- Category Mathematics, Physics & Philosophy
- Started by Harry Gindi
- Comments 8
- Last comment by Harry Gindi
- Last Active 1 day ago

- Discussion Type
- discussion topicrheonomy in supergravity -- elementary formalization?
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 32
- Last comment by David_Corfield
- Last Active 1 day ago

- Discussion Type
- discussion topicMnemonics for category theory
- Category Mathematics, Physics & Philosophy
- Started by Peter Heinig
- Comments 21
- Last comment by Peter Heinig
- Last Active 7 days ago

- Discussion Type
- discussion topicSuper Lie n-algebra extensions, higher WZW models and super p-branes with tensor multiplet fields
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 62
- Last comment by David_Corfield
- Last Active Jul 19th 2017

- Discussion Type
- discussion topicHow essential is planarity for rigorous treatments of pasting diagrams and pasting schemes?
- Category Mathematics, Physics & Philosophy
- Started by Peter Heinig
- Comments 7
- Last comment by Peter Heinig
- Last Active Jul 19th 2017

- Discussion Type
- discussion topicstring diagrams for closed categories
- Category Mathematics, Physics & Philosophy
- Started by Mike Shulman
- Comments 27
- Last comment by Mike Shulman
- Last Active Jul 18th 2017

- Discussion Type
- discussion topicpasting diagram
- Category Mathematics, Physics & Philosophy
- Started by Eric
- Comments 12
- Last comment by Peter Heinig
- Last Active Jul 18th 2017

- Discussion Type
- discussion topicspace and quantity
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 17
- Last comment by Peter Heinig
- Last Active Jul 16th 2017

- Discussion Type
- discussion topicAcirclic categories?
- Category Mathematics, Physics & Philosophy
- Started by Peter Heinig
- Comments 3
- Last comment by Tim_Porter
- Last Active Jul 13th 2017

- Discussion Type
- discussion topicHigher model theory
- Category Mathematics, Physics & Philosophy
- Started by Peter Heinig
- Comments 4
- Last comment by Urs
- Last Active Jul 12th 2017

- Discussion Type
- discussion topicHigher model theory - another possible test question concerning an existent use of identity arrows
- Category Mathematics, Physics & Philosophy
- Started by Peter Heinig
- Comments 2
- Last comment by Mike Shulman
- Last Active Jul 10th 2017

- Discussion Type
- discussion topicperfect ring
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 4
- Last comment by David_Corfield
- Last Active Jul 7th 2017

- Discussion Type
- discussion topicRelating two functors via one "intermediary" functor.
- Category Mathematics, Physics & Philosophy
- Started by Peter Heinig
- Comments 3
- Last comment by Peter Heinig
- Last Active Jul 5th 2017

- Discussion Type
- discussion topicGeneral linear 2-groupoid
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 6
- Last comment by Tim_Porter
- Last Active Jul 1st 2017

- Discussion Type
- discussion topica "first order" lifting problem
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 4
- Last comment by Mike Shulman
- Last Active Jun 25th 2017

- Discussion Type
- discussion topicToy Models of Differential Cohesion?
- Category Mathematics, Physics & Philosophy
- Started by maxsnew
- Comments 36
- Last comment by DavidRoberts
- Last Active Jun 24th 2017

- Discussion Type
- discussion topicHETEROMORPHISMS
- Category Mathematics, Physics & Philosophy
- Started by jim_stasheff
- Comments 10
- Last comment by Todd_Trimble
- Last Active Jun 24th 2017

- Discussion Type
- discussion topicsymbol for infinitesimal shape
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 91
- Last comment by Urs
- Last Active Jun 22nd 2017

- Discussion Type
- discussion topic"Finitely presented" (in the group-theory-sense) categories: recommendations of articles or books?
- Category Mathematics, Physics & Philosophy
- Started by Peter Heinig
- Comments 6
- Last comment by Peter Heinig
- Last Active Jun 20th 2017

- Discussion Type
- discussion topicProperty-functors switchable by an inflationary endofunctor: how to call them?
- Category Mathematics, Physics & Philosophy
- Started by Peter Heinig
- Comments 2
- Last comment by Todd_Trimble
- Last Active Jun 14th 2017

- Discussion Type
- discussion topicadjunction
- Category Mathematics, Physics & Philosophy
- Started by Eric
- Comments 63
- Last comment by Peter Heinig
- Last Active Jun 12th 2017

- Discussion Type
- discussion topicenriching in a cohesive topos
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 1
- Last comment by David_Corfield
- Last Active Jun 11th 2017

- Discussion Type
- discussion topicdifferential cohesion
- Category Mathematics, Physics & Philosophy
- Started by Mike Shulman
- Comments 8
- Last comment by Mike Shulman
- Last Active Jun 9th 2017

- Discussion Type
- discussion topicgraph infinity-toposes
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 2
- Last comment by spitters
- Last Active Jun 2nd 2017

- Discussion Type
- discussion topicPoints of toposes of sheaves on larger-than-usual sites
- Category Mathematics, Physics & Philosophy
- Started by IngoBlechschmidt
- Comments 6
- Last comment by IngoBlechschmidt
- Last Active May 27th 2017

- Discussion Type
- discussion topicultraproduct
- Category Mathematics, Physics & Philosophy
- Started by Tim_Porter
- Comments 6
- Last comment by jesse
- Last Active May 25th 2017

- Discussion Type
- discussion topicwave function collapse and split monomorphisms
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 20
- Last comment by Urs
- Last Active May 21st 2017

- Discussion Type
- discussion topicone-sided linearly distributive categories
- Category Mathematics, Physics & Philosophy
- Started by Mike Shulman
- Comments 1
- Last comment by Mike Shulman
- Last Active May 16th 2017

- Discussion Type
- discussion topicsimplicial sets as a classifying topos
- Category Mathematics, Physics & Philosophy
- Started by Mike Shulman
- Comments 3
- Last comment by Mike Shulman
- Last Active May 10th 2017