morphism of varieties造句

When this definition is used, a morphism of varieties is just a morphism of locally ringed spaces.
A scheme, by definition, has an open affine chart and thus a morphism of schemes can also be described in terms of such charts ( compare the definition of morphism of varieties ).
An " isogeny " between two elliptic curves is a non-trivial morphism of varieties ( defined by a rational map ) between the curves which also respects the group laws, and hence which sends the point at infinity ( serving as the identity of the group law ) to the point at infinity.
It's difficult to find morphism of varieties in a sentence. 用morphism of varieties造句挺难的