arXiv · 0911.4318
We define character sheaves on an ind-variety of the form G((t))/U_P where G((t)) is a loop group and U_P is the prounipotent radical of a parahoric subgroup P of G((t)).
G. Lusztig. 2009-11-23. Parabolic character sheaves, III. https://arxiv.org/abs/0911.4318
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