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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 internal-categories k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure 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 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

1. • CommentRowNumber1.
   • CommentAuthorTim_Porter
   • CommentTimeJan 22nd 2017
   • (edited Jan 22nd 2017)
   • PermaLink
   Author: Tim_Porter
   Format: MarkdownItexDoes anyone know the address of a homepage for [[Peter Freyd]] as the current link is dead?

   Does anyone know the address of a homepage for Peter Freyd as the current link is dead?

2. • CommentRowNumber2.
   • CommentAuthorTodd_Trimble
   • CommentTimeJan 22nd 2017
   • PermaLink
   Author: Todd_Trimble
   Format: MarkdownItexI just replaced the link. Not sure what happened there; Toby did an edit yesterday.

   I just replaced the link. Not sure what happened there; Toby did an edit yesterday.

3. • CommentRowNumber3.
   • CommentAuthorTim_Porter
   • CommentTimeJan 22nd 2017
   • PermaLink
   Author: Tim_Porter
   Format: MarkdownItexThanks.

   Thanks.

4. • CommentRowNumber4.
   • CommentAuthorTobyBartels
   • CommentTimeJan 23rd 2017
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexMy edit didn\'t change that link, which has been unchanged since the beginning. I suppose that at some point, the UPenn math department redesigned their site and didn\'t give a fuck about incoming links because it\'s not like they\'re part of some sort of world-wide web or anything, right?

   My edit didn't change that link, which has been unchanged since the beginning. I suppose that at some point, the UPenn math department redesigned their site and didn't give a fuck about incoming links because it's not like they're part of some sort of world-wide web or anything, right?

5. • CommentRowNumber5.
   • CommentAuthorTobyBartels
   • CommentTimeJan 23rd 2017
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexThe [web archive says](http://web.archive.org/web/20161217173121*/https://www.math.upenn.edu/FacData.html) that the old page disappeared sometime between 2015 September 9 and 2016 December 21. (Its calendar claims to have recorded other snapshots in the meantime, including one on December 21 a mere second before the changed one, but their own URIs say that they're all copies of the version from September 9. So I guess that that\'s some sort of bug in the archive.)

   The web archive says that the old page disappeared sometime between 2015 September 9 and 2016 December 21. (Its calendar claims to have recorded other snapshots in the meantime, including one on December 21 a mere second before the changed one, but their own URIs say that they’re all copies of the version from September 9. So I guess that that's some sort of bug in the archive.)