Corollary 19.4:

If $ p : \widetilde X \longrightarrow X$ is a regular covering then

   Deck$\displaystyle (\widetilde X, X) \cong
\pi_1(X, x_0)/p{*}(\pi_1(\widetilde X, \tilde x_1)).\eqno(19.5)
$



nisha 2012-03-20