Cockcroft properties of graphs of 2-complexes
N. D. Gilbert, James Howie · Proceedings of the Royal Society of Edinburgh Section A Mathematics · 1994
Necessary and sufficient conditions are obtained for the 2-skeleton of the total space of a graph of 2-complexes to be Cockcroft, or L-Cockcroft for some subgroup L of the fundamental group. These conditions are used to construct new examples of Cockcroft and absolutely Cockcroft 2-complexes.