For quantum affine A_n, the dominant ℓ-weights of every Weyl module are exactly the interval products in an explicit finite closure, Hom spaces between Weyl modules are at most one-dimensional, and the socle is described.
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On dominant $\ell$--weights and maps between Weyl modules for quantum affine $A_n$
For quantum affine A_n, the dominant ℓ-weights of every Weyl module are exactly the interval products in an explicit finite closure, Hom spaces between Weyl modules are at most one-dimensional, and the socle is described.