Monodromy of the Casimir connection of a symmetrisable Kac–Moody algebra
Monodromy of the Casimir connection of a symmetrisable Kac–Moody algebra
复制标题
对称 Kac-Moody 代数的卡西米尔连接的单向性
DOI:
10.1007/s00222-024-01242-8
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发表时间:
2015
影响因子:
3.1
通讯作者:
V. Toledano
中科院分区:
文献类型:
--
作者:
Andrea Appel;V. Toledano
<jats:p>Let <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathfrak {g}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>g</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> be a symmetrisable Kac–Moody algebra and <jats:inline-formula><jats:alternatives><jats:tex-math>$V$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>V</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> an integrable <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathfrak {g}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>g</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula>–module in category <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathcal {O}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>O</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula>. We show that the monodromy of the (normally ordered) rational Casimir connection on <jats:inline-formula><jats:alternatives><jats:tex-math>$V$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>V</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> can be made equivariant with respect to the Weyl group <jats:inline-formula><jats:alternatives><jats:tex-math>$W$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>W</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> of <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathfrak {g}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>g</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula>, and therefore defines an action of the braid group <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathcal {B}_{W}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msub>
<mml:mi>B</mml:mi>
<mml:mi>W</mml:mi>
</mml:msub>
</mml:math></jats:alternatives></jats:inline-formula> on <jats:inline-formula><jats:alternatives><jats:tex-math>$V$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>V</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula>. We then prove that this action is canonically equivalent to the quantum Weyl group action of <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathcal {B}_{W}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msub>
<mml:mi>B</mml:mi>
<mml:mi>W</mml:mi>
</mml:msub>
</mml:math></jats:alternatives></jats:inline-formula> on a quantum deformation of <jats:inline-formula><jats:alternatives><jats:tex-math>$V$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>V</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula>, that is an integrable, category <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathcal {O}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>O</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> module <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathcal {V}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>V</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> over the quantum group <jats:inline-formula><jats:alternatives><jats:tex-math>$U_{\hbar }\mathfrak {g}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:msub>
<mml:mi>U</mml:mi>
<mml:mi>ħ</mml:mi>
</mml:msub>
<mml:mi>g</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> such that <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathcal {V}/\hbar \mathcal {V}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>V</mml:mi>
<mml:mo>/</mml:mo>
<mml:mi>ħ</mml:mi>
<mml:mi>V</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> is isomorphic to <jats:inline-formula><jats:alternatives><jats:tex-math>$V$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>V</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula>. This extends a result of the second author which is valid for <jats:inline-formula><jats:alternatives><jats:tex-math>$\mathfrak {g}$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mi>g</mml:mi>
</mml:math></jats:alternatives></jats:inline-formula> semisimple.</jats:p>
影响因子:
0.6
作者:
Appel A
通讯作者:
Appel A