When L/F is a tame extension of Henselian fields (i.e.char(F) { [L : JF]), we analyze the underlying division algebra C D of the corestriction coτ L , F (D) of a tame division algebra D over L with respect to the unique valuations of C D and D extending the valuations on F and L. We show that the value group of C D lies in the value group of D and for the center ofresidue division algebra, Z{W) CN
Jean-Pierre TignolAdrian R. Wadsworth