Boundary module
= Boundary module
{title2=$B^q=\operatorname{im}d^{q-1}$}
The submodule of coboundaries in degree $q$. The <cohomology group> is the corresponding <cycle module> modulo the boundary module.
= Boundary module
{title2=$B^q=\operatorname{im}d^{q-1}$}
The submodule of coboundaries in degree $q$. The <cohomology group> is the corresponding <cycle module> modulo the boundary module.