# nullhomotopic map

Let $f:X\to Y$ be a continuous map. We say that $f$ is nullhomotopic if there is a homotopy from $f$ to a constant map $c$, that is, $f\simeq c$.

Title nullhomotopic map NullhomotopicMap 2013-03-22 14:00:26 2013-03-22 14:00:26 drini (3) drini (3) 6 drini (3) Definition msc 55P10