<p>In this paper we apply a formula of the very-well poised <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1044_Article_IEq4.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="67" /> </InlineMediaObject> <EquationSource Format="TEX">\(_{2k+4}\phi _{2k+3}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mmultiscripts> <mrow /> <mrow> <mn>2</mn> <mi>k</mi> <mo>+</mo> <mn>4</mn> </mrow> <mrow /> </mmultiscripts> <msub> <mi>ϕ</mi> <mrow> <mn>2</mn> <mi>k</mi> <mo>+</mo> <mn>3</mn> </mrow> </msub> </mrow> </math></EquationSource> </InlineEquation> to write a <i>k</i>-tuple sum of <i>q</i>-series as a linear combination of terms wherein each term is a product of expressions of the form <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1044_Article_IEq5.gif" Format="GIF" Height="26" Rendition="HTML" Resolution="72" Type="Linedraw" Width="71" /> </InlineMediaObject> <EquationSource Format="TEX">\(\frac{1}{(qy, qy^{-1};q)_\infty }\)</EquationSource> <EquationSource Format="MATHML"><math> <mfrac> <mn>1</mn> <msub> <mrow> <mo stretchy="false">(</mo> <mi>q</mi> <mi>y</mi> <mo>,</mo> <mi>q</mi> <msup> <mi>y</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mo>;</mo> <mi>q</mi> <mo stretchy="false">)</mo> </mrow> <mi>∞</mi> </msub> </mfrac> </math></EquationSource> </InlineEquation>. As an application, we shall express a variety of sums and double sums of <i>q</i>-series as linear combinations of infinite products. Our formulas are motivated by their connection to overpartition pairs.</p>

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On a formula of the q-series \(_{2k+4}\phi _{2k+3}\) and its applications

  • George E. Andrews,
  • Mohamed El Bachraoui

摘要

In this paper we apply a formula of the very-well poised \(_{2k+4}\phi _{2k+3}\) 2 k + 4 ϕ 2 k + 3 to write a k-tuple sum of q-series as a linear combination of terms wherein each term is a product of expressions of the form \(\frac{1}{(qy, qy^{-1};q)_\infty }\) 1 ( q y , q y - 1 ; q ) . As an application, we shall express a variety of sums and double sums of q-series as linear combinations of infinite products. Our formulas are motivated by their connection to overpartition pairs.