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 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 finite 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 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 sheaves 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.

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 topicModel categories, Quillen equivalence
- Category Latest Changes
- Started by John Baez
- Comments 16
- Last comment by Urs
- Last Active Oct 25th 2012

- Discussion Type
- discussion topicclosed manifold
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 24th 2012

- Discussion Type
- discussion topicdegree of a continuous map
- Category Latest Changes
- Started by Urs
- Comments 5
- Last comment by Urs
- Last Active Oct 24th 2012

- Discussion Type
- discussion topicabelianization
- Category Latest Changes
- Started by Urs
- Comments 12
- Last comment by Tim_Porter
- Last Active Oct 24th 2012

- Discussion Type
- discussion topicrelative homology
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 24th 2012

- Discussion Type
- discussion topicChecking my understanding
- Category nLab General Discussions
- Started by Andrew Stacey
- Comments 6
- Last comment by Andrew Stacey
- Last Active Oct 24th 2012

- Discussion Type
- discussion topicproof verification
- Category Mathematics, Physics & Philosophy
- Started by jim_stasheff
- Comments 16
- Last comment by TobyBartels
- Last Active Oct 24th 2012

- Discussion Type
- discussion topicTOC in Sidebar?
- Category nLab Technical Matters
- Started by Eric
- Comments 27
- Last comment by Eric
- Last Active Oct 24th 2012

- Discussion Type
- discussion topiccobordims hypothesis
- Category Latest Changes
- Started by Urs
- Comments 2
- Last comment by Urs
- Last Active Oct 23rd 2012

- Discussion Type
- discussion topicsingular homology
- Category Latest Changes
- Started by Urs
- Comments 9
- Last comment by Urs
- Last Active Oct 23rd 2012

- Discussion Type
- discussion topicmodel structure for complete Segal spaces
- Category Latest Changes
- Started by Urs
- Comments 7
- Last comment by Urs
- Last Active Oct 23rd 2012

- Discussion Type
- discussion topicMore Tangential Matters
- Category Preprints & Publications
- Started by Andrew Stacey
- Comments 1
- Last comment by Andrew Stacey
- Last Active Oct 23rd 2012

- Discussion Type
- discussion topicfree module
- Category Latest Changes
- Started by Todd_Trimble
- Comments 4
- Last comment by Urs
- Last Active Oct 22nd 2012

- Discussion Type
- discussion topicTopological Quantum Field Theories from Compact Lie Groups
- Category Latest Changes
- Started by Urs
- Comments 13
- Last comment by domenico_fiorenza
- Last Active Oct 22nd 2012

- Discussion Type
- discussion topicfree modules over a pid
- Category Latest Changes
- Started by Todd_Trimble
- Comments 2
- Last comment by Urs
- Last Active Oct 22nd 2012

- Discussion Type
- discussion topicNielsen-Schreier theorem
- Category Latest Changes
- Started by Urs
- Comments 42
- Last comment by Urs
- Last Active Oct 22nd 2012

- Discussion Type
- discussion topicpseudofunctor
- Category Latest Changes
- Started by Mike Shulman
- Comments 1
- Last comment by Mike Shulman
- Last Active Oct 22nd 2012

- Discussion Type
- discussion topicCauchy filter
- Category Latest Changes
- Started by TobyBartels
- Comments 10
- Last comment by David_Corfield
- Last Active Oct 21st 2012

- Discussion Type
- discussion topicnPublications ISSN
- Category nJournal Organisation
- Started by domenico_fiorenza
- Comments 2
- Last comment by Andrew Stacey
- Last Active Oct 20th 2012

- Discussion Type
- discussion topicD-geometry
- Category Latest Changes
- Started by zskoda
- Comments 15
- Last comment by zskoda
- Last Active Oct 20th 2012

- Discussion Type
- discussion topicadequate subcategory
- Category Latest Changes
- Started by Andrew Stacey
- Comments 9
- Last comment by Andrew Stacey
- Last Active Oct 19th 2012

- Discussion Type
- discussion topicYang-Baxter, r-matrices
- Category Latest Changes
- Started by zskoda
- Comments 1
- Last comment by zskoda
- Last Active Oct 18th 2012

- Discussion Type
- discussion topicCOSHEP
- Category Latest Changes
- Started by Urs
- Comments 34
- Last comment by TobyBartels
- Last Active Oct 18th 2012

- Discussion Type
- discussion topicCohn localization
- Category Latest Changes
- Started by zskoda
- Comments 5
- Last comment by zskoda
- Last Active Oct 17th 2012

- Discussion Type
- discussion topiclocalization of a module
- Category Latest Changes
- Started by Urs
- Comments 11
- Last comment by zskoda
- Last Active Oct 17th 2012

- Discussion Type
- discussion topicfinite abelian group
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 17th 2012

- Discussion Type
- discussion topica bug with the Theorem-environments
- Category nLab Technical Matters
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 17th 2012

- Discussion Type
- discussion topicℵ
- Category Latest Changes
- Started by Urs
- Comments 3
- Last comment by TobyBartels
- Last Active Oct 17th 2012

- Discussion Type
- discussion topicnatural deduction tables
- Category Latest Changes
- Started by Urs
- Comments 16
- Last comment by TobyBartels
- Last Active Oct 17th 2012

- Discussion Type
- discussion topicThick subcategories of quasicategories
- Category Mathematics, Physics & Philosophy
- Started by Jon Beardsley
- Comments 2
- Last comment by Mike Shulman
- Last Active Oct 17th 2012

- Discussion Type
- discussion topicvariational calculus
- Category Latest Changes
- Started by Urs
- Comments 3
- Last comment by Urs
- Last Active Oct 17th 2012

- Discussion Type
- discussion topic"Mochizuki's proof of abc"
- Category Latest Changes
- Started by Todd_Trimble
- Comments 16
- Last comment by Mike Shulman
- Last Active Oct 16th 2012

- Discussion Type
- discussion topicidempotent complete (infinity,1)-category
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 16th 2012

- Discussion Type
- discussion topicGoogle Analytics
- Category nLab Technical Matters
- Started by Mike Shulman
- Comments 7
- Last comment by Mike Shulman
- Last Active Oct 16th 2012

- Discussion Type
- discussion topicLax equation
- Category Latest Changes
- Started by zskoda
- Comments 5
- Last comment by Mike Shulman
- Last Active Oct 16th 2012

- Discussion Type
- discussion topicTwoVect
- Category Latest Changes
- Started by Urs
- Comments 2
- Last comment by jamievicary
- Last Active Oct 15th 2012

- Discussion Type
- discussion topicLiouville integrability
- Category Latest Changes
- Started by Urs
- Comments 2
- Last comment by zskoda
- Last Active Oct 15th 2012

- Discussion Type
- discussion topiclocally presentable category
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 15th 2012

- Discussion Type
- discussion topicexchange structure
- Category Latest Changes
- Started by Tim_Porter
- Comments 4
- Last comment by TobyBartels
- Last Active Oct 14th 2012

- Discussion Type
- discussion topicFinite (co)limits in the absence of Choice
- Category Mathematics, Physics & Philosophy
- Started by DavidRoberts
- Comments 6
- Last comment by Mike Shulman
- Last Active Oct 13th 2012

- Discussion Type
- discussion topicLocal homeomorphisms of n-topoi
- Category Mathematics, Physics & Philosophy
- Started by DavidCarchedi
- Comments 19
- Last comment by DavidCarchedi
- Last Active Oct 13th 2012

- Discussion Type
- discussion topicdiagrams whose colimits are homotopy colimits
- Category Mathematics, Physics & Philosophy
- Started by Karol Szumiło
- Comments 3
- Last comment by Mike Shulman
- Last Active Oct 12th 2012

- Discussion Type
- discussion topicTorsor
- Category nLab General Discussions
- Started by Tim_Porter
- Comments 4
- Last comment by zskoda
- Last Active Oct 12th 2012

- Discussion Type
- discussion topicpractical foundations
- Category Latest Changes
- Started by Urs
- Comments 3
- Last comment by Urs
- Last Active Oct 12th 2012

- Discussion Type
- discussion topicghost field
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 12th 2012

- Discussion Type
- discussion topicmetric jet
- Category Latest Changes
- Started by Mike Shulman
- Comments 1
- Last comment by Mike Shulman
- Last Active Oct 12th 2012

- Discussion Type
- discussion topicfunctional
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 11th 2012

- Discussion Type
- discussion topicAll Pages Disabled
- Category nLab Technical Matters
- Started by Andrew Stacey
- Comments 8
- Last comment by Andrew Stacey
- Last Active Oct 11th 2012

- Discussion Type
- discussion topiclax vs oplax colimits
- Category Latest Changes
- Started by Mike Shulman
- Comments 4
- Last comment by Todd_Trimble
- Last Active Oct 11th 2012

- Discussion Type
- discussion topicleft adjoint of the nerve
- Category nLab General Discussions
- Started by Mike Shulman
- Comments 8
- Last comment by Urs
- Last Active Oct 11th 2012

- Discussion Type
- discussion topicBPTS instanton
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 10th 2012

- Discussion Type
- discussion topichafnian
- Category Latest Changes
- Started by zskoda
- Comments 1
- Last comment by zskoda
- Last Active Oct 9th 2012

- Discussion Type
- discussion topicTor
- Category Latest Changes
- Started by Urs
- Comments 2
- Last comment by Urs
- Last Active Oct 8th 2012

- Discussion Type
- discussion topiclocally free module
- Category Latest Changes
- Started by Urs
- Comments 5
- Last comment by Todd_Trimble
- Last Active Oct 8th 2012

- Discussion Type
- discussion topiccategory of modules
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Oct 8th 2012

- Discussion Type
- discussion topiccoherence theorem for monoidal bicategories
- Category Latest Changes
- Started by Mike Shulman
- Comments 2
- Last comment by Todd_Trimble
- Last Active Oct 7th 2012

- Discussion Type
- discussion topiccohesive models of SDG
- Category nLab General Discussions
- Started by Todd_Trimble
- Comments 8
- Last comment by Todd_Trimble
- Last Active Oct 6th 2012

- Discussion Type
- discussion topicFor Eric Forgy
- Category nLab General Discussions
- Started by Todd_Trimble
- Comments 4
- Last comment by Eric
- Last Active Oct 6th 2012

- Discussion Type
- discussion topiccoherence for bicategories with finite bilimits
- Category Latest Changes
- Started by Mike Shulman
- Comments 1
- Last comment by Mike Shulman
- Last Active Oct 5th 2012

- Discussion Type
- discussion topicCategories of morphisms
- Category Mathematics, Physics & Philosophy
- Started by domenico_fiorenza
- Comments 4
- Last comment by Urs
- Last Active Oct 5th 2012