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Minimal Number of Generators of a Product

This formalizes the result that if I,J are (nonzero) homogeneous ideals of a polynomial ring that are generated in a single degree, then the minimal number of generators of I times J is bounded below by the minimial number of generators of I plus the minimal number of generators of J minus 1. The proof makes use of initial ideals.

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Lean formalized proof of a bound on the minimal number of generators of a product of ideals.

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