  The Cancellation Problem for Affine Spaces is settled affirmatively, that is,
it is proved that : Let $ k $ be an algebraically closed field of
characteristic zero and let $n, m \in \mathbb{N}$. If $R[Y_1,..., Y_m] \cong_k
k[X_1,..., X_{n+m}]$ as $k$-algebras, where $Y_1,..., Y_m, X_1,..., X_{n+m}$
are indeterminates, then $R \cong_k k[X_1,..., X_n]$.
