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 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 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 topichom-object in a quasi-category
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Apr 5th 2010

- Discussion Type
- discussion topiccohomology of a category
- Category Mathematics, Physics & Philosophy
- Started by Tim_Porter
- Comments 4
- Last comment by zskoda
- Last Active Apr 5th 2010

- Discussion Type
- discussion topicGrothendieck fibration
- Category Latest Changes
- Started by Mike Shulman
- Comments 5
- Last comment by Tim_Porter
- Last Active Apr 5th 2010

- Discussion Type
- discussion topicSVG Editor HowTo
- Category Latest Changes
- Started by Andrew Stacey
- Comments 12
- Last comment by Andrew Stacey
- Last Active Apr 4th 2010

- Discussion Type
- discussion topicDirected graph
- Category Mathematics, Physics & Philosophy
- Started by Todd_Trimble
- Comments 3
- Last comment by Todd_Trimble
- Last Active Apr 4th 2010

- Discussion Type
- discussion topicA partial addition and some added details
- Category Latest Changes
- Started by Ian_Durham
- Comments 3
- Last comment by Ian_Durham
- Last Active Apr 3rd 2010

- Discussion Type
- discussion topicquantum state
- Category Latest Changes
- Started by Ian_Durham
- Comments 12
- Last comment by Ian_Durham
- Last Active Apr 3rd 2010

- Discussion Type
- discussion topicTest forum broken
- Category nLab Technical Matters
- Started by TobyBartels
- Comments 9
- Last comment by TobyBartels
- Last Active Apr 2nd 2010

- Discussion Type
- discussion topicSome problems were encountered
- Category nLab Technical Matters
- Started by Eric
- Comments 8
- Last comment by Eric
- Last Active Apr 2nd 2010

- Discussion Type
- discussion topic‘folk’
- Category Latest Changes
- Started by TobyBartels
- Comments 4
- Last comment by Mike Shulman
- Last Active Apr 2nd 2010

- Discussion Type
- discussion topicmonoidal bicategories
- Category Latest Changes
- Started by Mike Shulman
- Comments 4
- Last comment by Mike Shulman
- Last Active Apr 2nd 2010

- Discussion Type
- discussion topicSome updates
- Category Latest Changes
- Started by Ian_Durham
- Comments 7
- Last comment by Ian_Durham
- Last Active Apr 2nd 2010

- Discussion Type
- discussion topicGroup Presentation
- Category Latest Changes
- Started by Tim_Porter
- Comments 2
- Last comment by zskoda
- Last Active Apr 1st 2010

- Discussion Type
- discussion topicNew page: [[proper subset]]
- Category Latest Changes
- Started by TobyBartels
- Comments 41
- Last comment by Mike Shulman
- Last Active Mar 31st 2010

- Discussion Type
- discussion topicpermalink
- Category n-Forum
- Started by Eric
- Comments 26
- Last comment by TobyBartels
- Last Active Mar 31st 2010

- Discussion Type
- discussion topicPerelman got the Clay prize!
- Category Mathematics, Physics & Philosophy
- Started by zskoda
- Comments 8
- Last comment by zskoda
- Last Active Mar 30th 2010

- Discussion Type
- discussion topicClassical field theory
- Category Latest Changes
- Started by Ian_Durham
- Comments 3
- Last comment by Ian_Durham
- Last Active Mar 29th 2010

- Discussion Type
- discussion topic"Graphical" quantum channels
- Category Latest Changes
- Started by Ian_Durham
- Comments 9
- Last comment by Eric
- Last Active Mar 29th 2010

- Discussion Type
- discussion topicmultisymplectic geometry
- Category Latest Changes
- Started by Urs
- Comments 3
- Last comment by zskoda
- Last Active Mar 29th 2010

- Discussion Type
- discussion topicPage name change
- Category nLab Technical Matters
- Started by Ian_Durham
- Comments 5
- Last comment by Ian_Durham
- Last Active Mar 29th 2010

- Discussion Type
- discussion topicMenagerie
- Category Latest Changes
- Started by Tim_Porter
- Comments 3
- Last comment by Tim_Porter
- Last Active Mar 27th 2010

- Discussion Type
- discussion topic2-morphism
- Category Mathematics, Physics & Philosophy
- Started by Eric
- Comments 2
- Last comment by Urs
- Last Active Mar 27th 2010

- Discussion Type
- discussion topicpartially ordered dagger category
- Category Latest Changes
- Started by Urs
- Comments 4
- Last comment by Urs
- Last Active Mar 27th 2010

- Discussion Type
- discussion topiccartesian morphism
- Category Latest Changes
- Started by Urs
- Comments 5
- Last comment by Urs
- Last Active Mar 26th 2010

- Discussion Type
- discussion topicWhy do Lurie and the n-lab call closed model categories model categories?
- Category Mathematics, Physics & Philosophy
- Started by Harry Gindi
- Comments 5
- Last comment by Harry Gindi
- Last Active Mar 25th 2010

- Discussion Type
- discussion topicregular singular point
- Category Latest Changes
- Started by zskoda
- Comments 1
- Last comment by zskoda
- Last Active Mar 25th 2010

- Discussion Type
- discussion topicTerry Tao's post on MO related to category theory and topology
- Category Mathematics, Physics & Philosophy
- Started by Harry Gindi
- Comments 4
- Last comment by Tim_Porter
- Last Active Mar 25th 2010

- Discussion Type
- discussion topicKapranov's NCG
- Category Latest Changes
- Started by zskoda
- Comments 2
- Last comment by zskoda
- Last Active Mar 25th 2010

- Discussion Type
- discussion topicFuchsian equation
- Category Latest Changes
- Started by zskoda
- Comments 3
- Last comment by zskoda
- Last Active Mar 25th 2010

- Discussion Type
- discussion topictype theory -- help!
- Category Latest Changes
- Started by Urs
- Comments 35
- Last comment by Urs
- Last Active Mar 25th 2010

- Discussion Type
- discussion topicHow to move a page to history -- Urs please read!
- Category nLab Technical Matters
- Started by TobyBartels
- Comments 3
- Last comment by TobyBartels
- Last Active Mar 24th 2010

- Discussion Type
- discussion topicgeometrical optics
- Category Latest Changes
- Started by zskoda
- Comments 6
- Last comment by zskoda
- Last Active Mar 24th 2010

- Discussion Type
- discussion topicslope filtration
- Category Latest Changes
- Started by zskoda
- Comments 2
- Last comment by zskoda
- Last Active Mar 24th 2010

- Discussion Type
- discussion topicequivalence in a quasi-category
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Mar 24th 2010

- Discussion Type
- discussion topicRadically Elementary Category Theory
- Category Mathematics, Physics & Philosophy
- Started by Eric
- Comments 82
- Last comment by Urs
- Last Active Mar 24th 2010

- Discussion Type
- discussion topicBoundary maps in the simplex-category?
- Category Mathematics, Physics & Philosophy
- Started by Harry Gindi
- Comments 20
- Last comment by DavidRoberts
- Last Active Mar 24th 2010

- Discussion Type
- discussion topicMarkov chains
- Category Mathematics, Physics & Philosophy
- Started by Ian_Durham
- Comments 10
- Last comment by Ian_Durham
- Last Active Mar 24th 2010

- Discussion Type
- discussion topicFundamental Bigroupoids and 2-Covering Spaces
- Category Latest Changes
- Started by Urs
- Comments 3
- Last comment by Urs
- Last Active Mar 24th 2010

- Discussion Type
- discussion topicWhitehead tower in an (oo,1)-topos
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Mar 23rd 2010

- Discussion Type
- discussion topicExtremal quantum channels & open systems
- Category Latest Changes
- Started by Ian_Durham
- Comments 2
- Last comment by Urs
- Last Active Mar 23rd 2010

- Discussion Type
- discussion topicKan Extension
- Category Mathematics, Physics & Philosophy
- Started by Harry Gindi
- Comments 8
- Last comment by DavidRoberts
- Last Active Mar 23rd 2010

- Discussion Type
- discussion topicHeinz Hopf
- Category Mathematics, Physics & Philosophy
- Started by Ian_Durham
- Comments 1
- Last comment by Ian_Durham
- Last Active Mar 23rd 2010

- Discussion Type
- discussion topicholonomic D-module
- Category Latest Changes
- Started by zskoda
- Comments 2
- Last comment by zskoda
- Last Active Mar 22nd 2010

- Discussion Type
- discussion topicMarkov chains, part deux
- Category Latest Changes
- Started by Ian_Durham
- Comments 2
- Last comment by Eric
- Last Active Mar 22nd 2010

- Discussion Type
- discussion topicTalk on categorical quantum channels
- Category Latest Changes
- Started by Ian_Durham
- Comments 1
- Last comment by Ian_Durham
- Last Active Mar 22nd 2010

- Discussion Type
- discussion topicquantum mechanics in terms of †-compact categories
- Category Latest Changes
- Started by Urs
- Comments 2
- Last comment by Ian_Durham
- Last Active Mar 21st 2010

- Discussion Type
- discussion topicDay convolution and symmetric monoidal products
- Category Mathematics, Physics & Philosophy
- Started by Harry Gindi
- Comments 12
- Last comment by Urs
- Last Active Mar 21st 2010

- Discussion Type
- discussion topicIs the lab down?
- Category nLab Technical Matters
- Started by Ian_Durham
- Comments 4
- Last comment by Ian_Durham
- Last Active Mar 21st 2010

- Discussion Type
- discussion topicEntanglement
- Category Latest Changes
- Started by Ian_Durham
- Comments 1
- Last comment by Ian_Durham
- Last Active Mar 20th 2010

- Discussion Type
- discussion topicYoneda
- Category Mathematics, Physics & Philosophy
- Started by Ian_Durham
- Comments 9
- Last comment by Ian_Durham
- Last Active Mar 20th 2010

- Discussion Type
- discussion topicAQFTpolishe
- Category Latest Changes
- Started by Urs
- Comments 4
- Last comment by Eric
- Last Active Mar 20th 2010

- Discussion Type
- discussion topicDurov, Skoda et al
- Category Latest Changes
- Started by Urs
- Comments 4
- Last comment by zskoda
- Last Active Mar 19th 2010

- Discussion Type
- discussion topicPending forum upgrade - beta testers wanted
- Category n-Forum
- Started by Andrew Stacey
- Comments 20
- Last comment by Andrew Stacey
- Last Active Mar 19th 2010

- Discussion Type
- discussion topicTemporary blog shift
- Category Mathematics, Physics & Philosophy
- Started by David_Corfield
- Comments 15
- Last comment by Harry Gindi
- Last Active Mar 19th 2010

- Discussion Type
- discussion topicWhat is the scope of [[Online Resources]]?
- Category Mathematics, Physics & Philosophy
- Started by TobyBartels
- Comments 3
- Last comment by Eric
- Last Active Mar 18th 2010

- Discussion Type
- discussion topicWebCopier
- Category nLab Technical Matters
- Started by Andrew Stacey
- Comments 2
- Last comment by TobyBartels
- Last Active Mar 17th 2010

- Discussion Type
- discussion topiccochains on simplicial sets
- Category Latest Changes
- Started by zskoda
- Comments 5
- Last comment by Urs
- Last Active Mar 17th 2010

- Discussion Type
- discussion topicsmooth structure of path groupoid
- Category Latest Changes
- Started by Andrew Stacey
- Comments 3
- Last comment by Andrew Stacey
- Last Active Mar 17th 2010

- Discussion Type
- discussion topicUniversal Homotopy Theories
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Mar 16th 2010

- Discussion Type
- discussion topicglobal model structure on simplicial presheaves
- Category Latest Changes
- Started by Urs
- Comments 1
- Last comment by Urs
- Last Active Mar 16th 2010