<p>We define affine Super Yangian <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(Y_{\hbar }(\widehat{sl}(m|n), \Pi ) \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>Y</mi> <mi>ħ</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mover accent="true"> <mrow> <mi mathvariant="italic">sl</mi> </mrow> <mo stretchy="false">^</mo> </mover> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">|</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> <mi mathvariant="normal">Π</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> for affine special linear superalgebra <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\widehat{sl}(m|n)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mover accent="true"> <mrow> <mi mathvariant="italic">sl</mi> </mrow> <mo stretchy="false">^</mo> </mover> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">|</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> and arbitrary system of simple roots <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\Pi \)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">Π</mi> </math></EquationSource> </InlineEquation> in terms of minimalistic system of generators. We also consider Drinfeld presentation for affine super Yangian in the case of arbitrary simple root system <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\Pi \)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">Π</mi> </math></EquationSource> </InlineEquation> and prove that these two presentations (Drinfeld and minimalistic) of <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\(Y_{\hbar }(\widehat{sl}(m|n), \Pi )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>Y</mi> <mi>ħ</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mover accent="true"> <mrow> <mi mathvariant="italic">sl</mi> </mrow> <mo stretchy="false">^</mo> </mover> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">|</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> <mi mathvariant="normal">Π</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> are isomorphic as associative superalgebras. We also construct isomorphism of affine super Yangians <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\(Y_{\hbar }(\widehat{sl}(m|n), \Pi )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>Y</mi> <mi>ħ</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mover accent="true"> <mrow> <mi mathvariant="italic">sl</mi> </mrow> <mo stretchy="false">^</mo> </mover> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">|</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> <mi mathvariant="normal">Π</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\(Y_{\hbar }(\widehat{sl}(m|n), \Pi ')\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>Y</mi> <mi>ħ</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mover accent="true"> <mrow> <mi mathvariant="italic">sl</mi> </mrow> <mo stretchy="false">^</mo> </mover> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">|</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> <msup> <mi mathvariant="normal">Π</mi> <mo>′</mo> </msup> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> for different simple root systems <InlineEquation ID="IEq8"> <EquationSource Format="TEX">\(\Pi \)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">Π</mi> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq9"> <EquationSource Format="TEX">\(\Pi '\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mi mathvariant="normal">Π</mi> <mo>′</mo> </msup> </math></EquationSource> </InlineEquation>. After them we also define affine Weyl groupoid as a set of morphisms in category with objects, which are super Yanginas <InlineEquation ID="IEq10"> <EquationSource Format="TEX">\(Y_{\hbar }(\widehat{sl}(m|n), \Pi )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>Y</mi> <mi>ħ</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mover accent="true"> <mrow> <mi mathvariant="italic">sl</mi> </mrow> <mo stretchy="false">^</mo> </mover> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">|</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> <mi mathvariant="normal">Π</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation>, where <InlineEquation ID="IEq11"> <EquationSource Format="TEX">\(\Pi \)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">Π</mi> </math></EquationSource> </InlineEquation> is simple root system. We describe Weyl groupoid in terms of generators and describe action of these generators on super Yangians. We describe isomorphisms between <InlineEquation ID="IEq12"> <EquationSource Format="TEX">\(Y_{\hbar }(\widehat{sl}(m|n), \Pi )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>Y</mi> <mi>ħ</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mover accent="true"> <mrow> <mi mathvariant="italic">sl</mi> </mrow> <mo stretchy="false">^</mo> </mover> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">|</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> <mi mathvariant="normal">Π</mi> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq13"> <EquationSource Format="TEX">\(Y_{\hbar }(\widehat{sl}(m|n), \Pi ')\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msub> <mi>Y</mi> <mi>ħ</mi> </msub> <mrow> <mo stretchy="false">(</mo> <mover accent="true"> <mrow> <mi mathvariant="italic">sl</mi> </mrow> <mo stretchy="false">^</mo> </mover> <mrow> <mo stretchy="false">(</mo> <mi>m</mi> <mo stretchy="false">|</mo> <mi>n</mi> <mo stretchy="false">)</mo> </mrow> <mo>,</mo> <msup> <mi mathvariant="normal">Π</mi> <mo>′</mo> </msup> <mo stretchy="false">)</mo> </mrow> </mrow> </math></EquationSource> </InlineEquation> as elements of Weyl groupoid. Bibliography: 24 titles.</p>

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THE WEYL GROUPOID AND ITS ACTION ON AFFINE SUPER YANGIAN

  • V. D. Volkov,
  • V. A. Stukopin

摘要

We define affine Super Yangian \(Y_{\hbar }(\widehat{sl}(m|n), \Pi ) \) Y ħ ( sl ^ ( m | n ) , Π ) for affine special linear superalgebra \(\widehat{sl}(m|n)\) sl ^ ( m | n ) and arbitrary system of simple roots \(\Pi \) Π in terms of minimalistic system of generators. We also consider Drinfeld presentation for affine super Yangian in the case of arbitrary simple root system \(\Pi \) Π and prove that these two presentations (Drinfeld and minimalistic) of \(Y_{\hbar }(\widehat{sl}(m|n), \Pi )\) Y ħ ( sl ^ ( m | n ) , Π ) are isomorphic as associative superalgebras. We also construct isomorphism of affine super Yangians \(Y_{\hbar }(\widehat{sl}(m|n), \Pi )\) Y ħ ( sl ^ ( m | n ) , Π ) and \(Y_{\hbar }(\widehat{sl}(m|n), \Pi ')\) Y ħ ( sl ^ ( m | n ) , Π ) for different simple root systems \(\Pi \) Π and \(\Pi '\) Π . After them we also define affine Weyl groupoid as a set of morphisms in category with objects, which are super Yanginas \(Y_{\hbar }(\widehat{sl}(m|n), \Pi )\) Y ħ ( sl ^ ( m | n ) , Π ) , where \(\Pi \) Π is simple root system. We describe Weyl groupoid in terms of generators and describe action of these generators on super Yangians. We describe isomorphisms between \(Y_{\hbar }(\widehat{sl}(m|n), \Pi )\) Y ħ ( sl ^ ( m | n ) , Π ) and \(Y_{\hbar }(\widehat{sl}(m|n), \Pi ')\) Y ħ ( sl ^ ( m | n ) , Π ) as elements of Weyl groupoid. Bibliography: 24 titles.