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MiS Preprint

Products, coproducts and singular value decomposition

Bertfried Fauser


Products and coproducts may be recognized as morphisms in a monoidal tensor category of vector spaces. To gain invariant data of these morphisms, we can use singular value decomposition which attaches singular values, ie generalized eigenvalues, to these maps. We show, for the case of Grassmann and Clifford products, that twist maps significantly alter these data reducing degeneracies. Since non group like coproducts give rise to non classical behavior of the algebra of functions, ie make them noncommutative, we hope to be able to learn more about such geometries. Remarkably the coproduct for positive singular values of eigenvectors in $A$ yields directly corresponding eigenvectors in $A\otimes A$.

MSC Codes:
15A18, 16W30, 15A66
singular value decomposition, hopf algebra, clifford and grassmann algebra

Related publications

2006 Repository Open Access
Bertfried Fauser

Products, Coproducts, and Singular Value Decomposition

In: International journal of theoretical physics, 45 (2006) 9, pp. 1731-1755