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Lattices of minimum covolume in Chevalley groups over local fields of positive characteristic
In this article, we show that if G is a simply connected Chevalley group of either classical type of rank bigger than 1 or type E6 and if q>9 is a power of a prime number p>5, then G=G(Fq((t−1))), up to an automorphism, has a unique lattice of minimum covolume, …