On the Euler-Poincar\'e characteristic and mixed multiplicities of maximal degrees
Abstract
This paper defines the Euler-Poincar\'e characteristic of joint reductions of ideals which concerns the maximal terms in the Hilbert polynomial; characterizes the positivity of mixed multiplicities in terms of minimal joint reductions; proves the additivity and other elementary properties for mixed multiplicities. The results of the paper together with the results of [17] seem to show a natural and nice picture of mixed multiplicities of maximal degrees.
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