homotopy hypothesis-theorem
delooping hypothesis-theorem
stabilization hypothesis-theorem
A Gray-group is a semistrict version of a 3-group: it is a 3-group whose delooping is a one-object Gray groupoid.
Gray-groups are modeled by 2-crossed module in analogy to how strict 2-groups are modeled by crossed modules.
Last revised on February 26, 2013 at 08:48:57. See the history of this page for a list of all contributions to it.