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arXiv · 1111.6094

New results on q-positivity

Y. García Ramos·J. E. Martínez-Legaz·S. Simons
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Abstract

In this paper we discuss symmetrically self-dual spaces, which are simply real vector spaces with a symmetric bilinear form. Certain subsets of the space will be called q-positive, where q is the quadratic form induced by the original bilinear form. The notion of q-positivity generalizes the classical notion of the monotonicity of a subset of a product of a Banach space and its dual. Maximal q-positivity then generalizes maximal monotonicity. We discuss concepts generalizing the representations of monotone sets by convex functions, as well as the number of maximally q-positive extensions of a q-positive set. We also discuss symmetrically self-dual Banach spaces, in which we add a Banach space structure, giving new characterizations of maximal q-positivity. The paper finishes with two new examples.

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BibTeXRIS

Y. García Ramos, J. E. Martínez-Legaz, S. Simons. 2011-12-31. New results on q-positivity. https://doi.org/10.1007/s11117-012-0191-7

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