This is the website for the University of Regensburg open question seminar. We meet on Thursdays at 4pm (s.t.) at the SFB lecture hall

Previous questions

• 18.12.25 Grothendieck constructions over Cat^colim have all colimits
  an H_*-isomorphism of two finite groups is an isomorphism of groups

• 11.12.25 The gluing of a d-cell to a (d-1)-category does not change the (d-1)-core

• 4.12.25 Semidirect products as right adjoints
  Solution presented: If an anima A acts invertibly on a category C, then C is enriched in A-acyclic animae.

• 27.11.25 Lax limits and colimits in Prof

• 20.11.25 Stratified PD complexes and global Verdier duality

• 13.11.25 Tensor of bordism categories

• 06.11.25 A formula for the n-trunaction of an anima X as the realization of the (n+1)-coskeleton of the constant simiplical anima X

• 30.10.25 Tiny objects in Stranimae (Top[W^{-1}], where W is the collection of (strong) homotopy equivalences)?