wang yin <wang-y01@mails.tsinghua.edu.cn> writes:
> I want to deduce n[v]=2*n-n[c]-2 from
>
> n[e]=1/2*(3*n[v]+n[c])
> and
> n-n[e]+n[v]=1
>
> Another words: I want to express n[v] in terms of other variables.
>
> But solve does't work this for me.
> What function should I use?
Maybe something like
(C1) eliminate([n[e]=1/2*(3*n[v]+n[c]),n-n[e]+n[v]=1],[n[e]]);
(D1) [- n + 2 n - n - 2]
v c
(C2) solve(%,n[v]);
(D2) [n = 2 n - n - 2]
v c
(C3)
Wolfgang