Hi all!

I have declared two vector valued functions

G1:=(x,y,u)->(x/(1-a*y) , y/(1-a*y) , u/(1-a*y));

G2:=(x,y,u)->(x/(1-b*x) , y/(1-b*x) , u/(1-b*x));

And composed them, so far so good

G1G2 := G1@G2;

But now I would like to simplify G1G2, how can I do this? With simplify(G1G2) I get an error.

Any idea how I can fix this?

Thanks in advance,

Arta