  We study the general and connected stable ranks for $C^{\ast}$-algebras. We
estimate these ranks for certain $C(X)$-algebras, and use that to do the same
for certain group $C^{\ast}$-algebras. Furthermore, we also give estimates for
the ranks of crossed product $C^{\ast}$-algebras by finite group actions with
the Rokhlin property.

Operator Algebras