On the module structure of the center of hyperelliptic Krichever-Novikov algebras
On the module structure of the center of hyperelliptic Krichever-Novikov algebras
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DOI:
10.1090/conm/713/14312
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发表时间:
2017-06
期刊:
影响因子:
--
通讯作者:
B. Cox;Mee Seong Im
中科院分区:
文献类型:
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作者:
B. Cox;Mee Seong Im
We consider the coordinate ring of a hyperelliptic curve and let $\mathfrak{g}\otimes R$ be the corresponding current Lie algebra where $\mathfrak g$ is a finite dimensional simple Lie algebra defined over $\mathbb C$. We give a generator and relations description of the universal central extension of $\mathfrak{g}\otimes R$ in terms of certain families of polynomials $P_{k,i}$ and $Q_{k,i}$ and describe how the center $\Omega_R/dR$ decomposes into a direct sum of irreducible representations when the automorphism group is $C_{2k}$ or $D_{2k}$.