On finite non-degenerate braided tensor categories with a Lagrangian subcategory
On finite non-degenerate braided tensor categories with a Lagrangian subcategory
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具有拉格朗日子范畴的有限非简并编织张量范畴
DOI:
10.1090/btran/78
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
D. Sebbag
中科院分区:
文献类型:
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作者:
Shlomo Gelaki;D. Sebbag
<p>Let <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper W">
<mml:semantics>
<mml:mi>W</mml:mi>
<mml:annotation encoding="application/x-tex">W</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> be a finite dimensional vector space over <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="double-struck upper C">
<mml:semantics>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mi mathvariant="double-struck">C</mml:mi>
</mml:mrow>
<mml:annotation encoding="application/x-tex">\mathbb {C}</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> viewed as a purely odd supervector space, and let <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="s upper R e p left-parenthesis upper W right-parenthesis">
<mml:semantics>
<mml:mrow>
<mml:mi>s</mml:mi>
<mml:mi>R</mml:mi>
<mml:mi>e</mml:mi>
<mml:mi>p</mml:mi>
<mml:mo stretchy="false">(</mml:mo>
<mml:mi>W</mml:mi>
<mml:mo stretchy="false">)</mml:mo>
</mml:mrow>
<mml:annotation encoding="application/x-tex">sRep(W)</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> be the finite symmetric tensor category of finite dimensional superrepresentations of the finite supergroup <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="upper W">
<mml:semantics>
<mml:mi>W</mml:mi>
<mml:annotation encoding="application/x-tex">W</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula>. We show that the set of equivalence classes of finite non-degenerate braided tensor categories <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="script upper C">
<mml:semantics>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mi class="MJX-tex-caligraphic" mathvariant="script">C</mml:mi>
</mml:mrow>
<mml:annotation encoding="application/x-tex">\mathcal {C}</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> containing <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="s upper R e p left-parenthesis upper W right-parenthesis">
<mml:semantics>
<mml:mrow>
<mml:mi>s</mml:mi>
<mml:mi>R</mml:mi>
<mml:mi>e</mml:mi>
<mml:mi>p</mml:mi>
<mml:mo stretchy="false">(</mml:mo>
<mml:mi>W</mml:mi>
<mml:mo stretchy="false">)</mml:mo>
</mml:mrow>
<mml:annotation encoding="application/x-tex">sRep(W)</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> as a Lagrangian subcategory is a torsor over the cyclic group <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="double-struck upper Z slash 16 double-struck upper Z">
<mml:semantics>
<mml:mrow>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mi mathvariant="double-struck">Z</mml:mi>
</mml:mrow>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mo>/</mml:mo>
</mml:mrow>
<mml:mn>16</mml:mn>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mi mathvariant="double-struck">Z</mml:mi>
</mml:mrow>
</mml:mrow>
<mml:annotation encoding="application/x-tex">\mathbb {Z}/16\mathbb {Z}</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula>. In particular, we obtain that there are <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="8">
<mml:semantics>
<mml:mn>8</mml:mn>
<mml:annotation encoding="application/x-tex">8</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> non-equivalent such braided tensor categories <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="script upper C">
<mml:semantics>
<mml:mrow class="MJX-TeXAtom-ORD">
<mml:mi class="MJX-tex-caligraphic" mathvariant="script">C</mml:mi>
</mml:mrow>
<mml:annotation encoding="application/x-tex">\mathcal {C}</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> which are integral and <inline-formula content-type="math/mathml">
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="8">
<mml:semantics>
<mml:mn>8</mml:mn>
<mml:annotation encoding="application/x-tex">8</mml:annotation>
</mml:semantics>
</mml:math>
</inline-formula> which are non-integral.</p>