Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

• Username
• Password
• Remember me

• Sign in using OpenID
• Remember me

• Forgot your password?
• Apply for membership

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 definitions 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 nlab noncommutative noncommutative-geometry number-theory object 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
   • CommentTimeApr 1st 2010
   • PermaLink
   Author: Tim_Porter
   Format: MarkdownI have started an entry on [[group presentation]]s. This will lead to a discussion of identities among relations as well as feeding into the [[rewriting]] page.

   I have started an entry on group presentations. This will lead to a discussion of identities among relations as well as feeding into the rewriting page.

2. • CommentRowNumber2.
   • CommentAuthorzskoda
   • CommentTimeApr 1st 2010
   • PermaLink
   Author: zskoda
   Format: MarkdownI used to know (even few months ago) who was the inventor of the general method of presentations of groups (in 1870-s) but can not remember now. Wikipedia gives some example from 1856 but this was not systematic general usage yet, rather just "rules" for one example. We should look back into Magnus' historical essay.

   I used to know (even few months ago) who was the inventor of the general method of presentations of groups (in 1870-s) but can not remember now. Wikipedia gives some example from 1856 but this was not systematic general usage yet, rather just "rules" for one example. We should look back into Magnus' historical essay.