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• W2468711910 abstract "We consider the problem to determine the optimal rotations $R in {rm SO}(n)$ which minimize $$W: {rm SO}(n) to mathbb{R}^+_0,quad W(R,;D) := ||{rm sym}(RD - 1)||^2$$ for a given diagonal matrix $D := {rm diag}(d_1, ..., d_n) in mathbb{R}^{n times n}$. The function $W$ subject to minimization is the reduced form of the Cosserat shear-stretch energy, which, in its general form, is a contribution in any geometrically nonlinear, isotropic and quadratic Cosserat micropolar (extended) continuum model. We characterize the critical points of the energy $W(R,;D)$, determine the global minimizers and the global minimum. This proves the correctness of previously obtained formulae for the optimal Cosserat rotations in dimensions two and three. The key to the proof is a characterization of the entire set of (possibly non-symmetric) real matrix square roots of (possibly non-positive definite) real symmetric matrices which does not seem to be known in the literature." @default.
• W2468711910 created "2016-07-22" @default.
• W2468711910 creator A5007589941 @default.
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• W2468711910 date "2016-06-29" @default.
• W2468711910 modified "2023-09-23" @default.
• W2468711910 title "Optimality of the relaxed polar factors by a characterization of the set of real square roots of real symmetric matrices" @default.
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• W2468711910 hasPublicationYear "2016" @default.
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