%0 Journal Article %T Topological rigidity of automorphism actions on nilmanifolds %A Siddhartha Bhattacharya %J Mathematics %D 1999 %I arXiv %X Suppose $X_{1}, X_{2}$ are nilmanifolds and $\rho, \sigma$ are automorphism actions of a discrete group $\Gamma$ on $X_{1}$ and $X_{2}$ respectively. We show that if $(X_{1},\rho)$ and $(X_{2}, \sigma)$ satisfy certain additional conditions then every $\Gamma$-equivariant continuous map from $(X_{1},\rho)$ to $(X_{2},\sigma)$ is an affine map. %U http://arxiv.org/abs/math/9912010v1