Low dimensional homology of linear groups over Hensel local rings,
by Kevin P. Knudson, Northwestern University

Suppose that R is an augmented Hensel local k-algebra, where k is
an infinite field.  In this paper, we prove that the natural map
H_i(GL_n(k),Z/p) --> H_i(GL_n(R),Z/p) is an isomorphism for i<=3,
p distinct from char(k).  This implies the Friedlander-Milnor
conjecture in positive characteristic in degrees less than 3.