A necessary and sufficient condition for membership in [๐ข๐ฃ]
A necessary and sufficient condition for membership in [๐ข๐ฃ]
Levi has obtained [1] for [yP] and [uv] sufficiency conditions for membership of a power product in the ideal, which tests membership, in certain cases, by a calculation using only the weight and degree of the pp. In this paper we show Levi's conditions for [uv] are necessary as well โฆ