<p>In his 1984 AMS Memoir, Andrews introduced the notion of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(c\phi _k(n)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>c</mi> <msub> <mi>ϕ</mi> <mi>k</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>, which is the number of <i>k</i>-colored generalized Frobenius partitions of <i>n</i>. In 2019, by using the theory of modular forms, Chan, Wang and Yang considered the arithmetic properties of <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="52" /> </InlineMediaObject> <EquationSource Format="TEX">\(\text {C}\Phi _k(q)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mtext>C</mtext> <msub> <mi mathvariant="normal">Φ</mi> <mi>k</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi>q</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> for <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq3.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="81" /> </InlineMediaObject> <EquationSource Format="TEX">\(2\le k\le 17\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>2</mn> <mo>≤</mo> <mi>k</mi> <mo>≤</mo> <mn>17</mn> </mrow> </math></EquationSource> </InlineEquation>, where <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq2.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="52" /> </InlineMediaObject> <EquationSource Format="TEX">\(\text {C}\Phi _k(q)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mtext>C</mtext> <msub> <mi mathvariant="normal">Φ</mi> <mi>k</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi>q</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> denotes the generating function of <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(c\phi _k(n)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>c</mi> <msub> <mi>ϕ</mi> <mi>k</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>. More recently, the first author, Gu and Tang obtained the generating functions for <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq6.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="57" /> </InlineMediaObject> <EquationSource Format="TEX">\(\text {C}\Phi _{12}(q)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mtext>C</mtext> <msub> <mi mathvariant="normal">Φ</mi> <mn>12</mn> </msub> <mrow> <mo stretchy="false">(</mo> <mi>q</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> and derived some congruence properties for <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="48" /> </InlineMediaObject> <EquationSource Format="TEX">\(c\phi _k(n)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>c</mi> <msub> <mi>ϕ</mi> <mi>k</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> modulo <InlineEquation ID="IEq8"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq8.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(3^3\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>3</mn> <mn>3</mn> </msup> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq9"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq9.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="15" /> </InlineMediaObject> <EquationSource Format="TEX">\(3^4\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>3</mn> <mn>4</mn> </msup> </math></EquationSource> </InlineEquation>. In this paper, we obtain a new expression of <InlineEquation ID="IEq10"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq6.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="57" /> </InlineMediaObject> <EquationSource Format="TEX">\(\text {C}\Phi _{12}(q)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mtext>C</mtext> <msub> <mi mathvariant="normal">Φ</mi> <mn>12</mn> </msub> <mrow> <mo stretchy="false">(</mo> <mi>q</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>. Meanwhile, some new congruences for <InlineEquation ID="IEq11"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1233_Article_IEq11.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="53" /> </InlineMediaObject> <EquationSource Format="TEX">\(c\phi _{12}(n)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mi>c</mi> <msub> <mi>ϕ</mi> <mn>12</mn> </msub> <mrow> <mo stretchy="false">(</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> modulo powers of 3 are established.</p>

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New congruences for 12-colored generalized Frobenius partitions

  • Su-Ping Cui,
  • Chen-Yang Su,
  • Mei-Juan Xu

摘要

In his 1984 AMS Memoir, Andrews introduced the notion of \(c\phi _k(n)\) c ϕ k ( n ) , which is the number of k-colored generalized Frobenius partitions of n. In 2019, by using the theory of modular forms, Chan, Wang and Yang considered the arithmetic properties of \(\text {C}\Phi _k(q)\) C Φ k ( q ) for \(2\le k\le 17\) 2 k 17 , where \(\text {C}\Phi _k(q)\) C Φ k ( q ) denotes the generating function of \(c\phi _k(n)\) c ϕ k ( n ) . More recently, the first author, Gu and Tang obtained the generating functions for \(\text {C}\Phi _{12}(q)\) C Φ 12 ( q ) and derived some congruence properties for \(c\phi _k(n)\) c ϕ k ( n ) modulo \(3^3\) 3 3 and \(3^4\) 3 4 . In this paper, we obtain a new expression of \(\text {C}\Phi _{12}(q)\) C Φ 12 ( q ) . Meanwhile, some new congruences for \(c\phi _{12}(n)\) c ϕ 12 ( n ) modulo powers of 3 are established.