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Nonsplit extensions of modular Lie algebras of rank 2

A. S. Dzhumadil'daev and S. S. Ibraev

Second cohomology groups of irreducible representations of classical Lie algebras $A_2, B_2$ and $G_2$ over an algebraically closed field of characteristic $p>h$ are calculated. Here $h$ is the Coxeter number.

Homology, Homotopy and Applications, Vol. 4(2), 2002, pp. 141-163

http://www.rmi.acnet.ge/hha/volumes/2002/n2a6/v4n2a6.dvi (ps, dvi.gz, ps.gz, pdf)
ftp://ftp.rmi.acnet.ge/pub/hha/volumes/2002/n2a6/v4n2a6.dvi (ps, dvi.gz, ps.gz, pdf)