Jm Partitions and a Ladder Based Model for the Basic Crystal
نویسنده
چکیده
In [1], Vazirani and I gave a new interpretation of what we called ℓ-partitions, also known as (ℓ, 0)-Carter partitions. The primary interpretation of such a partition λ is that it corresponds to a Specht module S λ which remains irreducible over the finite Hecke algebra Hn(q) when we specialize q to a primitive ℓ th root of unity. In [1], we relied heavily on the description of such a partition in terms of its hook lengths, a condition provided by James and Mathas in [11]. In this paper, I introduce a new description of the crystal B(Λ 0) which helps us extend the results of [1] to all (ℓ, 0)-JM partitions (similar to (ℓ, 0)-Carter partitions, but not necessarily ℓ-regular), by using an analogous condition for hook lengths conjectured by James and Mathas in [17], and recently proven by Fayers in [4]. Using the new description of the crystal, I extend our previous theorems from [1] about the crystal B(Λ 0) of c sl ℓ to a larger class of partitions.
منابع مشابه
J un 2 00 9 Combinatorics of ( l , 0 ) - JM partitions , l - cores , the ladder crystal and the finite Hecke algebra
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تاریخ انتشار 2009