<p>We introduce the super-shadowing property in linear dynamics, where pseudotrajectories are approximated by sequences of the form <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="9_2025_2978_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="61" /> </InlineMediaObject> <EquationSource Format="TEX">\((\lambda _n T^n x)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">(</mo> <msub> <mi>λ</mi> <mi>n</mi> </msub> <msup> <mi>T</mi> <mi>n</mi> </msup> <mi>x</mi> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>, with <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="9_2025_2978_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="40" /> </InlineMediaObject> <EquationSource Format="TEX">\((\lambda _n)_n\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mrow> <mo stretchy="false">(</mo> <msub> <mi>λ</mi> <mi>n</mi> </msub> <mo stretchy="false">)</mo> </mrow> <mi>n</mi> </msub> </math></EquationSource> </InlineEquation> being complex scalars. For compact operators on Banach spaces, we characterize the operators that possess the positive super-shadowing property and the positive limit super-shadowing property. Additionally, we demonstrate that no surjective isometric operator on a separable Banach space <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="9_2025_2978_Article_IEq3.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="19" /> </InlineMediaObject> <EquationSource Format="TEX">\(X\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>X</mi> </math></EquationSource> </InlineEquation> with <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="9_2025_2978_Article_IEq4.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="87" /> </InlineMediaObject> <EquationSource Format="TEX">\(\text {dim}(X)&gt;1\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mtext>dim</mtext> <mo stretchy="false">(</mo> <mi>X</mi> <mo stretchy="false">)</mo> <mo>&gt;</mo> <mn>1</mn> </mrow> </math></EquationSource> </InlineEquation> can exhibit the positive super-shadowing property. Finally, we provide some results on upper frequently supercyclic and reiteratively supercyclic operators.</p>

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Super-Shadowing and Supercyclicity

  • Eric Cabezas,
  • Manuel Saavedra

摘要

We introduce the super-shadowing property in linear dynamics, where pseudotrajectories are approximated by sequences of the form \((\lambda _n T^n x)\) ( λ n T n x ) , with \((\lambda _n)_n\) ( λ n ) n being complex scalars. For compact operators on Banach spaces, we characterize the operators that possess the positive super-shadowing property and the positive limit super-shadowing property. Additionally, we demonstrate that no surjective isometric operator on a separable Banach space \(X\) X with \(\text {dim}(X)>1\) dim ( X ) > 1 can exhibit the positive super-shadowing property. Finally, we provide some results on upper frequently supercyclic and reiteratively supercyclic operators.