Verma modules over a Block Lie algebra

Details Verma modules over a Block Lie algebra Verma modules over a Block Lie algebra

2005-12-15

arxiv.org/abs/math/0512351v3

Mathematics

Representation Theory

7 pages. The previous version was posted by a mistake

Scientific paper

Let B be the Lie algebra with basis {L_{i,j},C|i,j\in Z} and relations [L_{i,j},L_{k,l}]=((j+1)k-i(l+1))L_{i+k,j+l}+i\delta_{i,-k}\delta_{j+l,-2}C, [C,L_{i,j}]=0. It is proved that an irreducible highest weight B-module is quasifinite if and only if it is a proper quotient of a Verma module. For an additive subgroup G of the base field F, there corresponds to a Lie algebra B(G) of Block type. Given a totalorder \succ on G and a weight \Lambda, a Verma B(G)-module M(\Lambda,\succ) is defined. The irreducibility of M(\Lambda,\succ) is completely determined.

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