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arxiv: math/9812112 · v1 · submitted 1998-12-18 · 🧮 math.AC

Permanental Ideals

classification 🧮 math.AC
keywords idealspermanentalalmostalwayscohen-macaulaycomponentscontrastdecomposition
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The principal result is a primary decomposition of ideals generated by the (2x2)-subpermanents of a generic matrix. These permanental ideals almost always have embedded components and their minimal primes are of three distinct heights. Thus the permanental ideals are almost never Cohen-Macaulay, in contrast with determinantal ideals.

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