ABSTRACT
Several recent results ([1], [2], [3], [4]) study the syzygies of toric varieties. In particular, the equations defining an embedded affine toric variety can be described. When the toric variety is projective one, the situation becomes special, since the semigroup defining it has a system of generators which lies on an hyperplane (i.e. there exists a map L with the properties in section 1 below).
