Definition:Morphism of Schemes

Definition
Let $(X, \OO_X)$ and $(Y, \OO_Y)$ be schemes.

A morphism of schemes from $(X, \OO_X)$ to $(Y, \OO_Y)$ is a morphism of locally ringed spaces from $(X, \OO_X)$ to $(Y, \OO_Y)$.

Also see

 * Definition:Scheme
 * Definition:Category of Schemes