<p>In this paper we consider the fractional type Marcinkiewicz integral operator <Equation ID="Equ57"> <MediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_Equ57.gif" Format="GIF" Height="68" Rendition="HTML" Resolution="72" Type="Linedraw" Width="505" /> </MediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }f(x) = \left( \int _{0}^{\infty } \left| \int _{\left| x-y \right| \le t } \frac{\Omega (x-y)}{\left| x-y \right| ^{n-1-\beta } } f(y)dy\right| ^{2}\frac{dt}{t^3} \right) ^{{1}/{2} },\quad 0&lt;\beta &lt;n,\)</EquationSource> <EquationSource Format="MATHML"><math display="block"> <mrow> <msub> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> </msub> <mi>f</mi> <mrow> <mo stretchy="false">(</mo> <mi>x</mi> <mo stretchy="false">)</mo> </mrow> <mo>=</mo> <msup> <mfenced close=")" open="("> <msubsup> <mo>∫</mo> <mrow> <mn>0</mn> </mrow> <mi>∞</mi> </msubsup> <msup> <mfenced close="|" open="|"> <msub> <mo>∫</mo> <mrow> <mfenced close="|" open="|"> <mi>x</mi> <mo>-</mo> <mi>y</mi> </mfenced> <mo>≤</mo> <mi>t</mi> </mrow> </msub> <mfrac> <mrow> <mi mathvariant="normal">Ω</mi> <mo stretchy="false">(</mo> <mi>x</mi> <mo>-</mo> <mi>y</mi> <mo stretchy="false">)</mo> </mrow> <msup> <mfenced close="|" open="|"> <mi>x</mi> <mo>-</mo> <mi>y</mi> </mfenced> <mrow> <mi>n</mi> <mo>-</mo> <mn>1</mn> <mo>-</mo> <mi>β</mi> </mrow> </msup> </mfrac> <mi>f</mi> <mrow> <mo stretchy="false">(</mo> <mi>y</mi> <mo stretchy="false">)</mo> </mrow> <mi>d</mi> <mi>y</mi> </mfenced> <mn>2</mn> </msup> <mfrac> <mrow> <mi mathvariant="italic">dt</mi> </mrow> <msup> <mi>t</mi> <mn>3</mn> </msup> </mfrac> </mfenced> <mrow> <mn>1</mn> <mo stretchy="false">/</mo> <mn>2</mn> </mrow> </msup> <mo>,</mo> <mspace width="1em" /> <mn>0</mn> <mo>&lt;</mo> <mi>β</mi> <mo>&lt;</mo> <mi>n</mi> <mo>,</mo> </mrow> </math></EquationSource> </Equation>and the corresponding commutator <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq1.gif" Format="GIF" Height="24" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }^b\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> <mi>b</mi> </msubsup> </math></EquationSource> </InlineEquation> generated by <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> with <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq3.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="105" /> </InlineMediaObject> <EquationSource Format="TEX">\(b\in BMO(\mathbb {R}^n)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>b</mi> <mo>∈</mo> <mi>B</mi> <mi>M</mi> <mi>O</mi> <mo stretchy="false">(</mo> <msup> <mrow> <mi mathvariant="double-struck">R</mi> </mrow> <mi>n</mi> </msup> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>. Typically, the bounds of <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq1.gif" Format="GIF" Height="24" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }^b\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> <mi>b</mi> </msubsup> </math></EquationSource> </InlineEquation> are <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq6.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(\beta \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>β</mi> </math></EquationSource> </InlineEquation>-dependent. We establish uniform quantitative weighted bounds for <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq1.gif" Format="GIF" Height="24" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }^b\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> <mi>b</mi> </msubsup> </math></EquationSource> </InlineEquation> with respect to <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq6.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(\beta \)</EquationSource> <EquationSource Format="MATHML"><math> <mi>β</mi> </math></EquationSource> </InlineEquation> on weighted Lebesgue spaces. Moreover, the corresponding bounds for the classical Marcnkiewicz integral <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq10.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="21" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _\Omega \)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>μ</mi> <mi mathvariant="normal">Ω</mi> </msub> </math></EquationSource> </InlineEquation> and the commutator <InlineEquation ID="IEq11"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq11.gif" Format="GIF" Height="21" Rendition="HTML" Resolution="72" Type="Linedraw" Width="21" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _\Omega ^b\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>μ</mi> <mi mathvariant="normal">Ω</mi> <mi>b</mi> </msubsup> </math></EquationSource> </InlineEquation> can be recovered from ones of <InlineEquation ID="IEq12"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> </msub> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq13"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq1.gif" Format="GIF" Height="24" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\(\mu _{\Omega ,\beta }^b\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>μ</mi> <mrow> <mi mathvariant="normal">Ω</mi> <mo>,</mo> <mi>β</mi> </mrow> <mi>b</mi> </msubsup> </math></EquationSource> </InlineEquation> when <InlineEquation ID="IEq14"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40840_2025_1949_Article_IEq14.gif" Format="GIF" Height="18" Rendition="HTML" Resolution="72" Type="Linedraw" Width="57" /> </InlineMediaObject> <EquationSource Format="TEX">\(\beta \rightarrow 0^+\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>β</mi> <mo stretchy="false">→</mo> <msup> <mn>0</mn> <mo>+</mo> </msup> </mrow> </math></EquationSource> </InlineEquation>.</p>

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The Uniform Quantitative Weighted Bounds for Fractional Type Marcinkiewicz Integrals and Commutators

  • Huoxiong Wu,
  • Lin Wu

摘要

In this paper we consider the fractional type Marcinkiewicz integral operator \(\mu _{\Omega ,\beta }f(x) = \left( \int _{0}^{\infty } \left| \int _{\left| x-y \right| \le t } \frac{\Omega (x-y)}{\left| x-y \right| ^{n-1-\beta } } f(y)dy\right| ^{2}\frac{dt}{t^3} \right) ^{{1}/{2} },\quad 0<\beta <n,\) μ Ω , β f ( x ) = 0 x - y t Ω ( x - y ) x - y n - 1 - β f ( y ) d y 2 dt t 3 1 / 2 , 0 < β < n , and the corresponding commutator \(\mu _{\Omega ,\beta }^b\) μ Ω , β b generated by \(\mu _{\Omega ,\beta }\) μ Ω , β with \(b\in BMO(\mathbb {R}^n)\) b B M O ( R n ) . Typically, the bounds of \(\mu _{\Omega ,\beta }\) μ Ω , β and \(\mu _{\Omega ,\beta }^b\) μ Ω , β b are \(\beta \) β -dependent. We establish uniform quantitative weighted bounds for \(\mu _{\Omega ,\beta }\) μ Ω , β and \(\mu _{\Omega ,\beta }^b\) μ Ω , β b with respect to \(\beta \) β on weighted Lebesgue spaces. Moreover, the corresponding bounds for the classical Marcnkiewicz integral \(\mu _\Omega \) μ Ω and the commutator \(\mu _\Omega ^b\) μ Ω b can be recovered from ones of \(\mu _{\Omega ,\beta }\) μ Ω , β and \(\mu _{\Omega ,\beta }^b\) μ Ω , β b when \(\beta \rightarrow 0^+\) β 0 + .