  This submission consists of two papers: 1) an erratum that corrects an error
in the proof of Proposition 4.3 in my paper "The Homogeneous Coordinate Ring of
a Toric Variety", and 2) the original (unchanged) version of the paper,
published in 1995. The original paper introduced the homogeneous coordinate
ring of a toric variety (now called the total coordinate ring or Cox ring) and
gave a quotient construction. The paper also studied sheaves on a toric
variety, and in Section 4 described its automorphism group. The error in the
proof of Proposition 4.3 resulted from the faulty assumption that a certain set
of graded endomorphisms forms a ring; rather, it is a monoid under composition.
The erratum notes this error and gives a correct proof of the proposition.
