Characters of irreducibleG-modules and cohomology ofG/P for the lie supergroupG=Q(N)
Characters of irreducibleG-modules and cohomology ofG/P for the lie supergroupG=Q(N)
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DOI:
10.1007/bf02399196
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发表时间:
1997-05
影响因子:
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通讯作者:
I. Penkov;V. Serganova
中科院分区:
文献类型:
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作者:
I. Penkov;V. Serganova
We prove a character formula for any finite-dimensional irreducible representationVof the “queer” Lie superalgebra g=q(n). It expresses chVin terms of the multiplicities of the irreducible g-subquotients of the cohomology groups of certain dominant g-bundles on the Π-symmetric projective spaces (i.e., on the homogeneous superspacesG/Pwhose reduced space is a projective space, whereG=Q(n)). We also establish recurrent relations for the above multiplicities, and this enables us to compute explicitly chVfor any givenV. This provides a complete solution to the Kac character problem for the Lie superalgebraq(n). Finally, we consider the particular cases ofq(2), q(3), andq(4) in which we compare the new character formula with the generic character formula of [12].