Dear GAP forum, I would be grateful if anybody help me about the following questions.
1) For a normal subgroup $N$ and a subgroup H of $G$, how we can compute the product $HN={hn|h\in H and n\in N}$? 2)For any $R$-module $M$ and $N$, how we can compute the tensor product $M$ and $N$? especially when $N=\mathbb{Z}$. 3) Let two groups $H$ and $K$ be given. Can we obtain the central product of $H$ and $K$? Any suggestions are welcome. Yours, Takjk _______________________________________________ Forum mailing list Forum@mail.gap-system.org http://mail.gap-system.org/mailman/listinfo/forum