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<p>We provide characterizations of Anosov representations of word hyperbolic groups into real semisimple Lie groups in terms of the existence of equivariant limit maps on the Gromov boundary, the Cartan property and the uniform gap summation property introduced by Guichard–Guéritaud–Kassel–Wienhard in [<CitationRef CitationID="CR24">24</CitationRef>]. We also study representations of finitely generated groups satisfying weak uniform gaps in eigenvalues and establish conditions to be Anosov. As an application, we also obtain a characterization of strongly convex cocompact subgroups of the projective linear group <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\textsf{PGL}_d({\mathbb {R}})\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi mathvariant="sans-serif">PGL</mi> <mi>d</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi mathvariant="double-struck">R</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>.</p>

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Anosov representations, strongly convex cocompact groups and weak eigenvalue gaps

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • Konstantinos Tsouvalas

摘要

We provide characterizations of Anosov representations of word hyperbolic groups into real semisimple Lie groups in terms of the existence of equivariant limit maps on the Gromov boundary, the Cartan property and the uniform gap summation property introduced by Guichard–Guéritaud–Kassel–Wienhard in [24]. We also study representations of finitely generated groups satisfying weak uniform gaps in eigenvalues and establish conditions to be Anosov. As an application, we also obtain a characterization of strongly convex cocompact subgroups of the projective linear group \(\textsf{PGL}_d({\mathbb {R}})\) PGL d ( R ) .