<p>Constructing a realisation of a statistical manifold as a statistical model, i.e a manifold with dual connections with respect to a Fisher metric, is an important question in information geometry. While a positive answer to this problem was given by the work on Hong Van Lé [<CitationRef CitationID="CR1">1</CitationRef>], writing explicitly the probability family giving rise to the Fisher metric is generally a difficult task. In this work, starting with the sheaf of solutions <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mathcal {J}_\nabla \)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi mathvariant="script">J</mi> <mi mathvariant="normal">∇</mi> </msub> </math></EquationSource> </InlineEquation> of the Hessian equation on a gauge structure <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\((M,\nabla )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">(</mo> <mi>M</mi> <mo>,</mo> <mi mathvariant="normal">∇</mi> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>, a canonical representation of the group associated to the Lie algebra formed by its sections is introduced. On the foliation it defines, a characterization of compact hyperbolic leaves is then obtained. Furthermore, these leaves can be provided with an explicit statistical model structure, that is a probability density defining a Fisher metric.</p>

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Canonical foliations of statistical manifolds with statistical models

  • Emmanuel Gnandi,
  • Michel Nguiffo Boyom,
  • Stéphane Puechmorel

摘要

Constructing a realisation of a statistical manifold as a statistical model, i.e a manifold with dual connections with respect to a Fisher metric, is an important question in information geometry. While a positive answer to this problem was given by the work on Hong Van Lé [1], writing explicitly the probability family giving rise to the Fisher metric is generally a difficult task. In this work, starting with the sheaf of solutions \(\mathcal {J}_\nabla \) J of the Hessian equation on a gauge structure \((M,\nabla )\) ( M , ) , a canonical representation of the group associated to the Lie algebra formed by its sections is introduced. On the foliation it defines, a characterization of compact hyperbolic leaves is then obtained. Furthermore, these leaves can be provided with an explicit statistical model structure, that is a probability density defining a Fisher metric.