<p>Let <i>X</i> be a complex Banach space and denote by <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(F^p_\alpha (X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>F</mi> <mi>α</mi> <mi>p</mi> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(F^{w,p}_\alpha (X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>F</mi> <mi>α</mi> <mrow> <mi>w</mi> <mo>,</mo> <mi>p</mi> </mrow> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> the <i>X</i>-valued Fock spaces of entire functions <i>f</i> such that <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\Vert f(z)\Vert e^{-\frac{\alpha }{2}|z|^2}\in L^p(dA)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mrow> <mo stretchy="false">‖</mo> <mi>f</mi> <mrow> <mo stretchy="false">(</mo> <mi>z</mi> <mo stretchy="false">)</mo> </mrow> <mo stretchy="false">‖</mo> </mrow> <msup> <mi>e</mi> <mrow> <mo>-</mo> <mfrac> <mi>α</mi> <mn>2</mn> </mfrac> <msup> <mrow> <mo stretchy="false">|</mo> <mi>z</mi> <mo stretchy="false">|</mo> </mrow> <mn>2</mn> </msup> </mrow> </msup> <mo>∈</mo> <msup> <mi>L</mi> <mi>p</mi> </msup> <mrow> <mo stretchy="false">(</mo> <mi>d</mi> <mi>A</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(x^*(f(z))e^{-\frac{\alpha }{2}|z|^2}\in L^p(dA)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msup> <mi>x</mi> <mo>∗</mo> </msup> <mrow> <mo stretchy="false">(</mo> <mi>f</mi> <mrow> <mo stretchy="false">(</mo> <mi>z</mi> <mo stretchy="false">)</mo> </mrow> <mo stretchy="false">)</mo> </mrow> <msup> <mi>e</mi> <mrow> <mo>-</mo> <mfrac> <mi>α</mi> <mn>2</mn> </mfrac> <msup> <mrow> <mo stretchy="false">|</mo> <mi>z</mi> <mo stretchy="false">|</mo> </mrow> <mn>2</mn> </msup> </mrow> </msup> <mo>∈</mo> <msup> <mi>L</mi> <mi>p</mi> </msup> <mrow> <mo stretchy="false">(</mo> <mi>d</mi> <mi>A</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> for any <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(x^*\in X^*\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msup> <mi>x</mi> <mo>∗</mo> </msup> <mo>∈</mo> <msup> <mi>X</mi> <mo>∗</mo> </msup> </mrow> </math></EquationSource> </InlineEquation>, respectively. For Hilbert-valued functions, it is shown that <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(F^2_\alpha (H)=F^{w,2}_\alpha (H)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>F</mi> <mi>α</mi> <mn>2</mn> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>H</mi> <mo stretchy="false">)</mo> </mrow> <mo>=</mo> <msubsup> <mi>F</mi> <mi>α</mi> <mrow> <mi>w</mi> <mo>,</mo> <mn>2</mn> </mrow> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>H</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> if and only if <i>H</i> is finite dimensional and also that <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(F^2_\alpha (H)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>F</mi> <mi>α</mi> <mn>2</mn> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>H</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> can be identified with the space of Hilbert-Schmidt operators from <InlineEquation ID="IEq8"> <EquationSource Format="TEX">\(H\rightarrow F^2_\alpha \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>H</mi> <mo stretchy="false">→</mo> <msubsup> <mi>F</mi> <mi>α</mi> <mn>2</mn> </msubsup> </mrow> </math></EquationSource> </InlineEquation>. A proof of the density of polynomials in <InlineEquation ID="IEq9"> <EquationSource Format="TEX">\(F^p_\alpha (X)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>F</mi> <mi>α</mi> <mi>p</mi> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> for <InlineEquation ID="IEq10"> <EquationSource Format="TEX">\(p&lt;\infty \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>p</mi> <mo>&lt;</mo> <mi>∞</mi> </mrow> </math></EquationSource> </InlineEquation> is presented and also the expected duality <InlineEquation ID="IEq11"> <EquationSource Format="TEX">\((F^p_\alpha (X))^*= F^q_\alpha (X^*)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msup> <mrow> <mo stretchy="false">(</mo> <msubsup> <mi>F</mi> <mi>α</mi> <mi>p</mi> </msubsup> <mrow> <mo stretchy="false">(</mo> <mi>X</mi> <mo stretchy="false">)</mo> </mrow> <mo stretchy="false">)</mo> </mrow> <mo>∗</mo> </msup> <mo>=</mo> <msubsup> <mi>F</mi> <mi>α</mi> <mi>q</mi> </msubsup> <mrow> <mo stretchy="false">(</mo> <msup> <mi>X</mi> <mo>∗</mo> </msup> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> with <InlineEquation ID="IEq12"> <EquationSource Format="TEX">\(1\le p&lt;\infty \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>1</mn> <mo>≤</mo> <mi>p</mi> <mo>&lt;</mo> <mi>∞</mi> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq13"> <EquationSource Format="TEX">\(1/p+1/q=1\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>1</mn> <mo stretchy="false">/</mo> <mi>p</mi> <mo>+</mo> <mn>1</mn> <mo stretchy="false">/</mo> <mi>q</mi> <mo>=</mo> <mn>1</mn> </mrow> </math></EquationSource> </InlineEquation> is provided.</p>

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SOME RESULTS ON VECTOR-VALUED FOCK SPACES

  • Oscar Blasco,
  • Marc Ventura

摘要

Let X be a complex Banach space and denote by \(F^p_\alpha (X)\) F α p ( X ) and \(F^{w,p}_\alpha (X)\) F α w , p ( X ) the X-valued Fock spaces of entire functions f such that \(\Vert f(z)\Vert e^{-\frac{\alpha }{2}|z|^2}\in L^p(dA)\) f ( z ) e - α 2 | z | 2 L p ( d A ) and \(x^*(f(z))e^{-\frac{\alpha }{2}|z|^2}\in L^p(dA)\) x ( f ( z ) ) e - α 2 | z | 2 L p ( d A ) for any \(x^*\in X^*\) x X , respectively. For Hilbert-valued functions, it is shown that \(F^2_\alpha (H)=F^{w,2}_\alpha (H)\) F α 2 ( H ) = F α w , 2 ( H ) if and only if H is finite dimensional and also that \(F^2_\alpha (H)\) F α 2 ( H ) can be identified with the space of Hilbert-Schmidt operators from \(H\rightarrow F^2_\alpha \) H F α 2 . A proof of the density of polynomials in \(F^p_\alpha (X)\) F α p ( X ) for \(p<\infty \) p < is presented and also the expected duality \((F^p_\alpha (X))^*= F^q_\alpha (X^*)\) ( F α p ( X ) ) = F α q ( X ) with \(1\le p<\infty \) 1 p < and \(1/p+1/q=1\) 1 / p + 1 / q = 1 is provided.