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Generic separating sets for 3D elasticity tensors (1812.11380v1)
Published 29 Dec 2018 in math.RT, math-ph, and math.MP
Abstract: We define what is a generic separating set of invariant functions (a.k.a. a weak functional basis) for tensors. We produce then two generic separating sets of polynomial invariants for 3D elasticity tensors, one made of 19 polynomials and one made of 21 polynomials (but easier to compute) and a generic separating set of 18 rational invariants. As a byproduct, a new integrity basis for the fourth-order harmonic tensor is provided.
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