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-categories 2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry bundles calculus categories category category-theory chern-weil-theory cohesion cohesive-homotopy-theory cohesive-homotopy-type-theory cohomology colimits combinatorics complex-geometry computable-mathematics computer-science connection constructive constructive-mathematics cosmology definitions deformation-theory descent diagrams differential differential-cohomology differential-equations 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 grothendieck group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory history homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory integration integration-theory internal-categories k-theory lie-theory limit limits linear linear-algebra locale localization logic mathematics measure-theory modal-logic model model-category-theory monoidal monoidal-category-theory morphism motives motivic-cohomology multicategories noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory 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-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topological topology topos topos-theory type type-theory universal variational-calculus

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 topic"Twisted Cohomotopy implies M-theory anomaly cancellation"
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 56
- Last comment by Urs
- Last Active 6 days ago

- Discussion Type
- discussion topicPropositions as Regular/Effective Subsingletons?
- Category Mathematics, Physics & Philosophy
- Started by atmacen
- Comments 45
- Last comment by atmacen
- Last Active 6 days ago

- Discussion Type
- discussion topicDiagonal argument redux
- Category Mathematics, Physics & Philosophy
- Started by DavidRoberts
- Comments 7
- Last comment by DavidRoberts
- Last Active May 8th 2019

- Discussion Type
- discussion topicOptimal object in category. Metric, objective funct on category objects. Optimization over category?
- Category Mathematics, Physics & Philosophy
- Started by jonatan
- Comments 3
- Last comment by tomr
- Last Active May 6th 2019

- Discussion Type
- discussion topicHigher differentials, again
- Category Mathematics, Physics & Philosophy
- Started by Mike Shulman
- Comments 65
- Last comment by TobyBartels
- Last Active May 2nd 2019

- Discussion Type
- discussion topicElaboration (references) that adjoint functors can be used for (symbolic) optimization
- Category Mathematics, Physics & Philosophy
- Started by tomr
- Comments 2
- Last comment by David_Corfield
- Last Active Apr 24th 2019

- Discussion Type
- discussion topicCategory of institutions
- Category Mathematics, Physics & Philosophy
- Started by tomr
- Comments 2
- Last comment by Thomas Holder
- Last Active Apr 23rd 2019

- Discussion Type
- discussion topicMathematical realization of functors from category of tensors to category of graphs (neural coding)
- Category Mathematics, Physics & Philosophy
- Started by tomr
- Comments 6
- Last comment by DavidRoberts
- Last Active Mar 23rd 2019

- Discussion Type
- discussion topicWhen are coproduct inclusions closed under retracts?
- Category Mathematics, Physics & Philosophy
- Started by Karol Szumiło
- Comments 4
- Last comment by Karol Szumiło
- Last Active Mar 20th 2019

- Discussion Type
- discussion topicHaving an oo-left adjoint
- Category Mathematics, Physics & Philosophy
- Started by Alizter
- Comments 3
- Last comment by Dmitri Pavlov
- Last Active Mar 18th 2019

- Discussion Type
- discussion topicintrinsic differential cohesion?
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 6
- Last comment by Mike Shulman
- Last Active Mar 17th 2019

- Discussion Type
- discussion topicProjection & Section are duals of each other.
- Category Mathematics, Physics & Philosophy
- Started by Murat_Aygen
- Comments 1
- Last comment by Murat_Aygen
- Last Active Feb 11th 2019

- Discussion Type
- discussion topicDeligne-Lurie completeness theorem
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 1
- Last comment by David_Corfield
- Last Active Feb 10th 2019

- Discussion Type
- discussion topicChern classes of linear representations
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 56
- Last comment by Urs
- Last Active Feb 3rd 2019

- Discussion Type
- discussion topicEnriched local cartesian closure
- Category Mathematics, Physics & Philosophy
- Started by Mike Shulman
- Comments 2
- Last comment by Mike Shulman
- Last Active Jan 29th 2019

- Discussion Type
- discussion topicSuper Lie n-algebra extensions, higher WZW models and super p-branes
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 151
- Last comment by Urs
- Last Active Jan 25th 2019

- Discussion Type
- discussion topicA universal property of Day convolution
- Category Mathematics, Physics & Philosophy
- Started by hepworth
- Comments 3
- Last comment by Mike Shulman
- Last Active Dec 27th 2018

- Discussion Type
- discussion topicE. Finster, "Towards Higher Universal Algebra in Type Theory"
- Category Mathematics, Physics & Philosophy
- Started by Alizter
- Comments 18
- Last comment by Alizter
- Last Active Dec 25th 2018

- Discussion Type
- discussion topicHom Symmetric Monoidal Categories
- Category Mathematics, Physics & Philosophy
- Started by SridharRamesh
- Comments 10
- Last comment by Mike Shulman
- Last Active Dec 21st 2018

- Discussion Type
- discussion topicperceptual and mathematical invariants
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 20
- Last comment by David_Corfield
- Last Active Dec 17th 2018

- Discussion Type
- discussion topicHammock Localization
- Category Mathematics, Physics & Philosophy
- Started by mrmuon
- Comments 3
- Last comment by Mike Shulman
- Last Active Dec 12th 2018

- Discussion Type
- discussion topicEquivariant Cohomotopy and Branes
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 7
- Last comment by David_Corfield
- Last Active Dec 12th 2018

- Discussion Type
- discussion topicMultiplication for surreal numbers in HoTT
- Category Mathematics, Physics & Philosophy
- Started by Alizter
- Comments 3
- Last comment by Mike Shulman
- Last Active Dec 5th 2018

- Discussion Type
- discussion topicWhat exactly is a judgement?
- Category Mathematics, Physics & Philosophy
- Started by Alizter
- Comments 9
- Last comment by Alizter
- Last Active Nov 30th 2018

- Discussion Type
- discussion topicmodalities induced by cohesive (co)units
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 1
- Last comment by David_Corfield
- Last Active Nov 23rd 2018

- Discussion Type
- discussion topicInitiality Project: plans
- Category Mathematics, Physics & Philosophy
- Started by Mike Shulman
- Comments 103
- Last comment by atmacen
- Last Active Nov 7th 2018

- Discussion Type
- discussion topicHoTT: Category, Precategory and Univalent category?
- Category Mathematics, Physics & Philosophy
- Started by Alizter
- Comments 1
- Last comment by Alizter
- Last Active Nov 7th 2018

- Discussion Type
- discussion topicFailure of suspension spectrum functor to be strong closed?
- Category Mathematics, Physics & Philosophy
- Started by Urs
- Comments 4
- Last comment by Urs
- Last Active Nov 6th 2018

- Discussion Type
- discussion topicCwF natural model and universes
- Category Mathematics, Physics & Philosophy
- Started by Alizter
- Comments 14
- Last comment by Mike Shulman
- Last Active Oct 31st 2018

- Discussion Type
- discussion topicintroduction/elimination as co(units)
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 5
- Last comment by Mike Shulman
- Last Active Oct 31st 2018