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Regular version of the site

Book chapter

PBW-filtration over ℤ and Compatible Bases for V_Z(\lambda) in Type A_n and C_n

P. 35-63.
Feigin E., Littelmann P., Fourier G.

We study the PBW-filtration on the highest weight representations V(λ) of the Lie algebras of type A n and C n . This filtration is induced by the standard degree filtration on . In previous papers, the authors studied the filtration and the associated graded algebras and modules over the complex numbers. The aim of this paper is to present a proof of the results which holds over the integers and hence makes the whole construction available over any field.