<p>In this paper, we shall introduce a skew generalized Zb<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11784_2025_1178_Article_IEq1.gif" Format="GIF" Height="13" Rendition="HTML" Resolution="72" Type="Linedraw" Width="12" /> </InlineMediaObject> <EquationSource Format="TEX">\(\check{a}\)</EquationSource> <EquationSource Format="MATHML"><math> <mover accent="true"> <mi>a</mi> <mo stretchy="false">ˇ</mo> </mover> </math></EquationSource> </InlineEquation>ganu constant <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11784_2025_1178_Article_IEq2.gif" Format="GIF" Height="25" Rendition="HTML" Resolution="72" Type="Linedraw" Width="90" /> </InlineMediaObject> <EquationSource Format="TEX">\(C^{(p)}_{Z}(\varsigma ,\upsilon ,X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>C</mi> <mi>Z</mi> <mrow> <mo stretchy="false">(</mo> <mi>p</mi> <mo stretchy="false">)</mo> </mrow> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>ς</mi> <mo>,</mo> <mi>υ</mi> <mo>,</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>. First, we give the upper and lower bounds of this constant for any Banach spaces, as well as the exact values of the constant for some specific Banach spaces. The relationships between this constant and a few other constants are then shown, including the <i>J</i>(<i>X</i>), <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11784_2025_1178_Article_IEq3.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="57" /> </InlineMediaObject> <EquationSource Format="TEX">\(C_\textrm{NJ}(X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>C</mi> <mtext>NJ</mtext> </msub> <mrow> <mo stretchy="false">(</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>, and <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11784_2025_1178_Article_IEq4.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="89" /> </InlineMediaObject> <EquationSource Format="TEX">\(C^p_\textrm{NJ}(\varsigma , \upsilon , X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>C</mi> <mtext>NJ</mtext> <mi>p</mi> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>ς</mi> <mo>,</mo> <mi>υ</mi> <mo>,</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> constants. Furthermore, a characterization of uniformly non-square is provided, indicating that <i>X</i> possesses the fixed point property. A sufficient condition that implies normal structure is also established by the <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11784_2025_1178_Article_IEq5.gif" Format="GIF" Height="25" Rendition="HTML" Resolution="72" Type="Linedraw" Width="90" /> </InlineMediaObject> <EquationSource Format="TEX">\(C^{(p)}_{Z}(\varsigma ,\upsilon , X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>C</mi> <mi>Z</mi> <mrow> <mo stretchy="false">(</mo> <mi>p</mi> <mo stretchy="false">)</mo> </mrow> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>ς</mi> <mo>,</mo> <mi>υ</mi> <mo>,</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> constant. Finally, based on the <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11784_2025_1178_Article_IEq5.gif" Format="GIF" Height="25" Rendition="HTML" Resolution="72" Type="Linedraw" Width="90" /> </InlineMediaObject> <EquationSource Format="TEX">\(C^{(p)}_{Z}(\varsigma ,\upsilon , X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>C</mi> <mi>Z</mi> <mrow> <mo stretchy="false">(</mo> <mi>p</mi> <mo stretchy="false">)</mo> </mrow> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>ς</mi> <mo>,</mo> <mi>υ</mi> <mo>,</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> constant, another new constant <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11784_2025_1178_Article_IEq7.gif" Format="GIF" Height="25" Rendition="HTML" Resolution="72" Type="Linedraw" Width="90" /> </InlineMediaObject> <EquationSource Format="TEX">\(\widetilde{C}^{(p)}_{Z}(\varsigma ,\upsilon , X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mover accent="true"> <mi>C</mi> <mo stretchy="true">~</mo> </mover> <mi>Z</mi> <mrow> <mo stretchy="false">(</mo> <mi>p</mi> <mo stretchy="false">)</mo> </mrow> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>ς</mi> <mo>,</mo> <mi>υ</mi> <mo>,</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> is also introduced, its range of values for any Banach spaces and the exact values for some specific Banach space are studied.</p>

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Some aspects of skew generalized Zbǎganu constant in Banach spaces

  • Yuxin Wang,
  • Qi Liu,
  • Qian Li,
  • Qi Huang

摘要

In this paper, we shall introduce a skew generalized Zb \(\check{a}\) a ˇ ganu constant \(C^{(p)}_{Z}(\varsigma ,\upsilon ,X)\) C Z ( p ) ( ς , υ , X ) . First, we give the upper and lower bounds of this constant for any Banach spaces, as well as the exact values of the constant for some specific Banach spaces. The relationships between this constant and a few other constants are then shown, including the J(X), \(C_\textrm{NJ}(X)\) C NJ ( X ) , and \(C^p_\textrm{NJ}(\varsigma , \upsilon , X)\) C NJ p ( ς , υ , X ) constants. Furthermore, a characterization of uniformly non-square is provided, indicating that X possesses the fixed point property. A sufficient condition that implies normal structure is also established by the \(C^{(p)}_{Z}(\varsigma ,\upsilon , X)\) C Z ( p ) ( ς , υ , X ) constant. Finally, based on the \(C^{(p)}_{Z}(\varsigma ,\upsilon , X)\) C Z ( p ) ( ς , υ , X ) constant, another new constant \(\widetilde{C}^{(p)}_{Z}(\varsigma ,\upsilon , X)\) C ~ Z ( p ) ( ς , υ , X ) is also introduced, its range of values for any Banach spaces and the exact values for some specific Banach space are studied.