A short note on the non-negativity of partial Euler characteristics

Details A short note on the non-negativity of partial Euler characteristics A short note on the non-negativity of partial Euler characteristics

2004-09-04

arxiv.org/abs/math/0409059v1

Mathematics

Commutative Algebra

2 pages

Scientific paper

Let $(A,\mathfrak{m})$ be a Noetherian local ring, $M$ a finite $A$-module
and $x_1,...,x_n\in \m$ such that $\lambda (M/\x M)$ is finite. Serre proved
that all partial Euler characteristics of $M$ with respect to $\x$ is
non-negative. This fact is easy to show when $A$ contains a field. We give an
elementary proof of Serre's result when $A$ does not contain a field.

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