weak homotopy double groupoid
Definition 0.1.
a weak homotopy double groupoid (WHDG) of acompactly–generated space , (weak Hausdorff space) isdefined through a construction method similar to that developed by R. Brown (ref. [1]) for the homotopy double groupoid of a Hausdorff space. The key changes here involve replacing the regular homotopy equivalence relation
from the cited ref. with the weak homotopy equivalence relation
in the definition of the fundamental groupoid
, as well as replacing the Hausdorff space by the compactly-generated space . Therefore, the weak homotopy
data for the weak homotopy double groupoid of , , will now be:
References
- 1 R. Brown, K.A. Hardie, K.H. Kamps and T. Porter, A homotopy double groupoid of a Hausdorffspace, Theory and Applications of Categories 10,(2002): 71-93.