On a Classical Limit of q-Deformed Whittaker Functions
On a Classical Limit of q-Deformed Whittaker Functions
复制标题
论q变形Whittaker函数的经典极限
DOI:
10.1007/s11005-012-0545-x
复制
发表时间:
2011
影响因子:
1.2
通讯作者:
S. Oblezin
中科院分区:
文献类型:
--
作者:
A. Gerasimov;D. Lebedev;S. Oblezin
Previously, we derive a representation of q-deformed $${\mathfrak{gl}_{\ell+1}}$$ -Whittaker function as a sum over Gelfand–Zetlin patterns. This representation provides an analog of the Shintani–Casselman–Shalika formula for q-deformed $${\mathfrak{gl}_{\ell+1}}$$ -Whittaker functions. In this note, we provide a derivation of the Givental integral representation of the classical $${\mathfrak{gl}_{\ell+1}}$$ -Whittaker function as a limit q → 1 of the sum over the Gelfand–Zetlin patterns representation of the q-deformed $${\mathfrak{gl}_{\ell+1}}$$ -Whittaker function. Thus, Givental representation provides an analog the Shintani–Casselman–Shalika formula for classical Whittaker functions.