D. Scevenels, THE GENUS OF A DIRECT-PRODUCT OF NILPOTENT GROUPS OF A CERTAIN TYPE AND NONCANCELLATION PHENOMENA, Communications in algebra, 23(9), 1995, pp. 3223-3231
We study the relation between the genus of a direct product of nilpote
nt groups of a certain type and the direct product of their genera. We
show that the natural map Phi : G(N-1) x...x G(N-k) --> G(N-1 x...x N
-k) is surjective if the groups N-i are of a certain type. We also ded
uce some non-cancellation phenomena.