<p>We study the hypoellipticity and solvability properties of a class of time-periodic evolution operators, with coefficients globally defined on <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mathbb {R}^d\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mi>d</mi> </msup> </math></EquationSource> </InlineEquation> and growing polynomially with respect to the space variable. To this aim, we introduce a class of time-periodic weighted Sobolev spaces, whose elements are characterised in terms of suitable Fourier expansions associated with elliptic operators.</p>

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Global hypoellipticity and solvability for a class of evolution operators in time-periodic weighted Sobolev spaces

  • Fernando de Ávila Silva,
  • Matteo Bonino,
  • Sandro Coriasco

摘要

We study the hypoellipticity and solvability properties of a class of time-periodic evolution operators, with coefficients globally defined on \(\mathbb {R}^d\) R d and growing polynomially with respect to the space variable. To this aim, we introduce a class of time-periodic weighted Sobolev spaces, whose elements are characterised in terms of suitable Fourier expansions associated with elliptic operators.