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 categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex-geometry computable-mathematics computer-science constructive cosmology 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 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 limit limits linear linear-algebra locale localization logic manifolds mathematics measure-theory modal modal-logic model model-category-theory monads monoidal monoidal-category-theory morphism motives motivic-cohomology natural 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 string string-theory subobject superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory 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 topicYoneda lemma
- Category n-Forum
- Started by keithalewis
- Comments 9
- Last comment by Mike Shulman
- Last Active 3 days ago

- Discussion Type
- discussion topicMissing images from Todd Trimble's surface diagram notes
- Category n-Forum
- Started by Alec Rhea
- Comments 7
- Last comment by Alec Rhea
- Last Active Feb 18th 2021

- Discussion Type
- discussion topicForum spam
- Category n-Forum
- Started by Andrew Stacey
- Comments 68
- Last comment by zskoda
- Last Active Jan 29th 2021

- Discussion Type
- discussion topicDeleting duplicates
- Category n-Forum
- Started by Tim_Porter
- Comments 3
- Last comment by Richard Williamson
- Last Active Dec 29th 2020

- Discussion Type
- discussion topicLogic of Imperatives in HoTT
- Category n-Forum
- Started by Nima
- Comments 8
- Last comment by David_Corfield
- Last Active Dec 28th 2020

- Discussion Type
- discussion topicType theory language with set theoretic objects?
- Category n-Forum
- Started by justin
- Comments 3
- Last comment by justin
- Last Active Dec 26th 2020

- Discussion Type
- discussion topic(Off topic) Trying to get a hold of Urs
- Category n-Forum
- Started by Eric
- Comments 1
- Last comment by Eric
- Last Active Dec 14th 2020

- Discussion Type
- discussion topicStrong induction principle for NNO
- Category n-Forum
- Started by YimingXu
- Comments 9
- Last comment by martinescardo
- Last Active Dec 13th 2020

- Discussion Type
- discussion topicUnderstand a proof in Lawvere's ETCS
- Category n-Forum
- Started by YimingXu
- Comments 6
- Last comment by YimingXu
- Last Active Nov 16th 2020

- Discussion Type
- discussion topicAdvice on tapping into "modalic math"?
- Category n-Forum
- Started by jin
- Comments 4
- Last comment by Urs
- Last Active Nov 16th 2020

- Discussion Type
- discussion topicAppearance of formulas
- Category n-Forum
- Started by HDB
- Comments 4
- Last comment by Urs
- Last Active Sep 23rd 2020

- Discussion Type
- discussion topicProfunctorial Homotopy Theory
- Category n-Forum
- Started by nonemenon
- Comments 2
- Last comment by nonemenon
- Last Active Sep 14th 2020

- Discussion Type
- discussion topicLogic in infinity groupoids?
- Category n-Forum
- Started by Hurkyl
- Comments 5
- Last comment by Hurkyl
- Last Active Jul 2nd 2020

- Discussion Type
- discussion topicDelete account
- Category n-Forum
- Started by Guest
- Comments 5
- Last comment by Richard Williamson
- Last Active Apr 16th 2020

- Discussion Type
- discussion topicrelationship between torsors and codiscrete groupoids?
- Category n-Forum
- Started by ziggurism
- Comments 1
- Last comment by ziggurism
- Last Active Mar 6th 2020

- Discussion Type
- discussion topiccomposition of quivers
- Category n-Forum
- Started by jim_stasheff
- Comments 2
- Last comment by Tim_Porter
- Last Active Feb 17th 2020

- Discussion Type
- discussion topicTerms of Service
- Category n-Forum
- Started by TobyBartels
- Comments 15
- Last comment by Richard Williamson
- Last Active Dec 4th 2019

- Discussion Type
- discussion topicContraction as (co)derivation
- Category n-Forum
- Started by jim_stasheff
- Comments 1
- Last comment by jim_stasheff
- Last Active Sep 6th 2019

- Discussion Type
- discussion topicIs it possible to change username?
- Category n-Forum
- Started by Michael Albanese
- Comments 12
- Last comment by DavidRoberts
- Last Active Sep 1st 2019

- Discussion Type
- discussion topicLooking for guidance on how to approach analyzing Casanova with topos theory
- Category n-Forum
- Started by metaweta
- Comments 1
- Last comment by metaweta
- Last Active Aug 29th 2019

- Discussion Type
- discussion topicHeyting-algebra homomorphism and topology
- Category n-Forum
- Started by Pieter
- Comments 2
- Last comment by Pieter
- Last Active Jun 9th 2019

- Discussion Type
- discussion topicNew nForum Style
- Category n-Forum
- Started by Andrew Stacey
- Comments 64
- Last comment by Richard Williamson
- Last Active May 25th 2019

- Discussion Type
- discussion topicCategorical definition of "division" or "remainder"
- Category n-Forum
- Started by Pieter
- Comments 51
- Last comment by Mike Shulman
- Last Active Feb 22nd 2019

- Discussion Type
- discussion topicProjections
- Category n-Forum
- Started by Pieter
- Comments 8
- Last comment by Mike Shulman
- Last Active Feb 3rd 2019

- Discussion Type
- discussion topicNew member
- Category n-Forum
- Started by Pieter
- Comments 11
- Last comment by Pieter
- Last Active Feb 2nd 2019

- Discussion Type
- discussion topiccurvature
- Category n-Forum
- Started by jim_stasheff
- Comments 1
- Last comment by jim_stasheff
- Last Active Jan 20th 2019

- Discussion Type
- discussion topicOpen Problems in Category Theory
- Category n-Forum
- Started by JoyDivision
- Comments 3
- Last comment by David_Corfield
- Last Active Nov 28th 2018

- Discussion Type
- discussion topicGeneralizing Cech-Delign Complex
- Category n-Forum
- Started by Cheynejmiller
- Comments 2
- Last comment by Urs
- Last Active Oct 4th 2018

- Discussion Type
- discussion topicAnonymous posting to nForum switched back on
- Category n-Forum
- Started by Richard Williamson
- Comments 6
- Last comment by Richard Williamson
- Last Active Oct 3rd 2018

- Discussion Type
- discussion topicabstract model theory (institutions), modal logic & contexts
- Category n-Forum
- Started by bblfish
- Comments 10
- Last comment by bblfish
- Last Active Sep 20th 2018

- Discussion Type
- discussion topicnForum membership ranks and privileges
- Category n-Forum
- Started by Tim_Porter
- Comments 3
- Last comment by TobyBartels
- Last Active Aug 4th 2018

- Discussion Type
- discussion topicprobabilistic type theory
- Category n-Forum
- Started by Ahmed
- Comments 3
- Last comment by David_Corfield
- Last Active Apr 18th 2018

- Discussion Type
- discussion topicformatting help
- Category n-Forum
- Started by Mike Shulman
- Comments 22
- Last comment by Urs
- Last Active Feb 16th 2018

- Discussion Type
- discussion topicHow to ascertain whether an nLab article with short name already has a "Latest Changes" thread?
- Category n-Forum
- Started by Peter Heinig
- Comments 6
- Last comment by RodMcGuire
- Last Active Jul 16th 2017

- Discussion Type
- discussion topicSubscribing to discussions
- Category n-Forum
- Started by PaoloPerrone
- Comments 3
- Last comment by Urs
- Last Active Dec 4th 2016

- Discussion Type
- discussion topicScience of Logic discussion down
- Category n-Forum
- Started by David_Corfield
- Comments 8
- Last comment by tonyjones
- Last Active Sep 6th 2016

- Discussion Type
- discussion topicrequest hung when activating notifications
- Category n-Forum
- Started by jesuslop
- Comments 3
- Last comment by Urs
- Last Active Jun 17th 2016

- Discussion Type
- discussion topicName Change
- Category n-Forum
- Started by fastlane69
- Comments 2
- Last comment by TobyBartels
- Last Active May 20th 2016

- Discussion Type
- discussion topicdocumenting link syntax
- Category n-Forum
- Started by Mike Shulman
- Comments 1
- Last comment by Mike Shulman
- Last Active May 9th 2016

- Discussion Type
- discussion topicadvanced search
- Category n-Forum
- Started by Karol Szumiło
- Comments 5
- Last comment by Karol Szumiło
- Last Active Mar 5th 2016

- Discussion Type
- discussion topicOpenID 2.0 going away
- Category n-Forum
- Started by Mike Shulman
- Comments 4
- Last comment by Mike Shulman
- Last Active May 12th 2015

- Discussion Type
- discussion topicRSS fees
- Category n-Forum
- Started by spitters
- Comments 5
- Last comment by Andrew Stacey
- Last Active Dec 7th 2014

- Discussion Type
- discussion topictags
- Category n-Forum
- Started by Mike Shulman
- Comments 17
- Last comment by Andrew Stacey
- Last Active Aug 10th 2014

- Discussion Type
- discussion topicchat room?
- Category n-Forum
- Started by Jon Beardsley
- Comments 6
- Last comment by Mike Shulman
- Last Active Apr 13th 2014

- Discussion Type
- discussion topicTesting chrome with preview
- Category n-Forum
- Started by Andrew Stacey
- Comments 4
- Last comment by Andrew Stacey
- Last Active Mar 18th 2014

- Discussion Type
- discussion topicBug in design
- Category n-Forum
- Started by porton
- Comments 4
- Last comment by Andrew Stacey
- Last Active Feb 8th 2014

- Discussion Type
- discussion topic`\partial` breaks preview
- Category n-Forum
- Started by TobyBartels
- Comments 7
- Last comment by TobyBartels
- Last Active Dec 12th 2013

- Discussion Type
- discussion topicquestion to the nForum participants
- Category n-Forum
- Started by Urs
- Comments 20
- Last comment by TobyBartels
- Last Active Sep 13th 2013

- Discussion Type
- discussion topicmore false spam alerts
- Category n-Forum
- Started by Urs
- Comments 6
- Last comment by Urs
- Last Active Sep 1st 2013

- Discussion Type
- discussion topicsemidirect product
- Category n-Forum
- Started by elif
- Comments 10
- Last comment by Tim_Porter
- Last Active Sep 1st 2013

- Discussion Type
- discussion topicCombinatorics, Physics, and their Interaction
- Category n-Forum
- Started by jim_stasheff
- Comments 3
- Last comment by TobyBartels
- Last Active Sep 1st 2013

- Discussion Type
- discussion topicpro-C completion
- Category n-Forum
- Started by elif
- Comments 4
- Last comment by Tim_Porter
- Last Active Aug 30th 2013

- Discussion Type
- discussion topicLie Rinehart algebras
- Category n-Forum
- Started by jim_stasheff
- Comments 1
- Last comment by jim_stasheff
- Last Active Aug 17th 2013

- Discussion Type
- discussion topicStrange behaviour
- Category n-Forum
- Started by Tim_Porter
- Comments 3
- Last comment by Urs
- Last Active Jun 30th 2013

- Discussion Type
- discussion topicLink bug.
- Category n-Forum
- Started by TobyBartels
- Comments 3
- Last comment by Guest
- Last Active Jun 25th 2013

- Discussion Type
- discussion topicText formatters and guest post updates
- Category n-Forum
- Started by Andrew Stacey
- Comments 2
- Last comment by Mike Shulman
- Last Active Jun 20th 2013

- Discussion Type
- discussion topiccodecogs
- Category n-Forum
- Started by zskoda
- Comments 1
- Last comment by zskoda
- Last Active Nov 13th 2012

- Discussion Type
- discussion topicsearching for numbered Definitions/Theorems
- Category n-Forum
- Started by Urs
- Comments 8
- Last comment by Urs
- Last Active Nov 8th 2012

- Discussion Type
- discussion topicsearch on the nForum
- Category n-Forum
- Started by Urs
- Comments 9
- Last comment by Mike Shulman
- Last Active Oct 29th 2012

- Discussion Type
- discussion topicReplacing reCaptcha
- Category n-Forum
- Started by Andrew Stacey
- Comments 5
- Last comment by TobyBartels
- Last Active Oct 1st 2012