chapter  16
4 Pages

Further Applications to Spheres

WithMarvin J. Greenberg, John R. Harper

(16.1) Proposition. Let r:Sn → Sn be the reflection r(x 0, …, xn ) = (–x 0, x 1, …, xn ). Then the induced homomorphism H n ( r ) : H n ( S n ) → H n ( S n )