Information Geometry and its Applications III

Abstract Jun Zhang

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Jun Zhang  (University of Michigan/AFOSR, USA)
Thursday, August 05, 2010, room Hörsaal 2
Divergence functions and their relation to metrical, equiaffine and symplectic structures on the manifold

Given a manifold M, a divergence function D is a non-negative function on the product manifold formula7 that achieves its global minimum of zero (with semi-positive definite Hessian) at those points that form its diagonal submanifold formula9. It is well-known that the statistical structure on M (a Riemmanian metric with a pair of conjugate affine connections) can be constructed from the second and third derivatives of D evaluated at formula9. In Zhang (2004) and subsequent work, a framework based on convex analysis is proposed to unify familiar families of divergence functions. The resulting geometry, which displays what is called ``reference-representation biduality'', completely captures the alpha-structure (i.e., statistical structure with a parametric family of conjugate connections) of the classical information geometry. This is the alpha-Hessian geometry with equi-affine structure. Here, we continue this investigation in two parallel fronts, namely, how D on formula7 a) is related to various Minkowski metrics on M; and b) generates a symplectic structure of M. On point a, a set of inequalities are developed that uniformly bounds D by Minkowski distances on M. On point b, convex-induced divergence functions will be shown to generate a Kähler structure under which the statistical structure of M can be modeled.


Date and Location

August 02 - 06, 2010
University of Leipzig
04103 Leipzig

Scientific Organizers

Nihat Ay
Max Planck Institute for Mathematics in the Sciences
Information Theory of Cognitive Systems Group
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Paolo Gibilisco
Università degli Studi di Roma "Tor Vergata"
Facoltà di Economia
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František Matúš
Academy of Sciences of the Czech Republic
Institute of Information Theory and Automation
Czech Republic
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Scientific Committee

Shun-ichi Amari
Brain Science Institute, Mathematical Neuroscience Laboratory
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Imre Csiszár
Hungarian Academy of Sciences
Alfréd Rényi Institute of Mathematics
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Dénes Petz
Budapest University of Technology and Economics
Department for Mathematical Analysis
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Giovanni Pistone
Collegio Carlo Alberto, Moncalieri
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Administrative Contact

Antje Vandenberg
Max Planck Institute for Mathematics in the Sciences
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Phone: (++49)-(0)341-9959-552
Fax: (++49)-(0)341-9959-555

05.04.2017, 12:42