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Re: anything faster than Solve[] for solving sets of polynomial equations symbolically?

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  Re: anything faster than Solve[] for solving sets of polynomial equations symbolically? dantimatter <google@dantimatter.com> - 2011-05-04 23:47 +0000

#2101 — Re: anything faster than Solve[] for solving sets of polynomial equations symbolically?

Hi Bobby,

> eqs = {-k5 x1 x3 + k6 x4 == 0,
>     k1 x1 - k4 x2 - 2 k2 x2^2 + 2 k3 x3 + k7 x4 == 0,
>     k2 x2^2 - k3 x3 - k5 x1 x3 + k6 x4 == 0, x1 + x4 - Xtot == 0};
> nonNeg = Thread[{k1, k2, k3, k4, k5, k6, k7, Xtot} >= 0];
> real = Element[vars = {x1, x2, x3, x4}, Reals];
> problem = Flatten@{eqs, nonNeg};
> Solve[problem, Reals] // FullSimplify

I'm getting an error message that 'Xtot >= 0 is not a well-formed equation'.  Is this something that you encountered as well?  Also, is your Solve[] function call missing a reference to the variables, or am I just confused?

Thanks!
Dan

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