  In Weyl's "The Classical Groups", he introduces some some remarkable
differential operators, which he calls "quasi-compositions" of the polarization
operators Dij. In the present paper, an equivalent combinatorial formulation is
obtained for these operators, and is then used to obtain explicit formulas for
the differentials in certain complexes (constucted by Zelevinsky, and further
studied by Verma, Akin et al.) which furnish higher syzygies for the Pluecker
equations, and also for the defining relations for Weyl modules.
