CW subcomplex
= CW subcomplex
{c}
A <CW subcomplex> is a union of cells of a <CW complex> containing the attaching boundary of every included cell. In a combinatorial <2-complex>, including a two-cell therefore includes every edge in its boundary. A connected <CW subcomplex> has a connected <1-skeleton>, whose intrinsic path metric may differ from the ambient graph metric.