<p>We define a new norm called the <i>p</i>-numerical radius of a pair of bounded linear operators on <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41478_2024_874_Article_IEq1.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="112" /> </InlineMediaObject> <EquationSource Format="TEX">\({\mathcal {B}}_{p}({\mathcal {H}})\times {\mathcal {B}}_{p}({\mathcal {H}})\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi mathvariant="script">B</mi> <mi>p</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi mathvariant="script">H</mi> <mo stretchy="false">)</mo> </mrow> <mo>×</mo> <msub> <mi mathvariant="script">B</mi> <mi>p</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi mathvariant="script">H</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>, where <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41478_2024_874_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="46" /> </InlineMediaObject> <EquationSource Format="TEX">\({\mathcal {B}}_{p}({\mathcal {H}})\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi mathvariant="script">B</mi> <mi>p</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi mathvariant="script">H</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> is the Schatten <i>p</i>-class. We give some bounds for this norm. We apply the properties of this norm to deduce several bounds for the <i>p</i>-numerical radii of <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41478_2024_874_Article_IEq3.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="39" /> </InlineMediaObject> <EquationSource Format="TEX">\(2\times 2\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>2</mn> <mo>×</mo> <mn>2</mn> </mrow> </math></EquationSource> </InlineEquation> operator matrices. Also, we investigate the transition between this norm and the <i>p</i>-numerical radius of a single operator.</p>

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Further p-numerical radius inequalities

  • Soumia Aici,
  • Abdelkader Frakis,
  • Fuad Kittaneh

摘要

We define a new norm called the p-numerical radius of a pair of bounded linear operators on \({\mathcal {B}}_{p}({\mathcal {H}})\times {\mathcal {B}}_{p}({\mathcal {H}})\) B p ( H ) × B p ( H ) , where \({\mathcal {B}}_{p}({\mathcal {H}})\) B p ( H ) is the Schatten p-class. We give some bounds for this norm. We apply the properties of this norm to deduce several bounds for the p-numerical radii of \(2\times 2\) 2 × 2 operator matrices. Also, we investigate the transition between this norm and the p-numerical radius of a single operator.