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Thibault
07/01/13 08:26am

Hello,

I am struggling with mathematica 8 to extract polynomial parameters from an equation (did it by hand but i wanted confirmation) the software only returns an input interpretation and not the actual result.
I'd be very grateful if someone could help me.

Thx for your time

input:
f = (2^(1/6)/((1 - 2^(1/6))*r))^2;
k = f*((3/2) kb*t - H);
S = kb*ln[
c*(2*pi*exp (1)/((1/kb*t)*K0))^(3/2)] - (3/
2)*((-23/12) + (10*k/(3*K0)) - (2*k^2/K0^2) + (2*
k^3/(3*K0^3)) - (k^4/(12*K0^4)));
S2 = a0 + a1*H + a2*(H^2) + a3*(H^3) + a4*(H^4);
sol = Solve[S == S2, {a0, a1, a2, a3, a4}]

output:
Solve::svars: Equations may not give solutions for all "solve" variables. >>

{{a4 -> -(a0/H^4) - a1/H^3 - a2/H^2 - a3/H + (1/(
H^4))(-(3/
2) (-(23/12) + (10 2^(1/3) (-H + (3 kb t)/2))/(
3 (1 - 2^(1/6))^2 K0 r^2) - (
2 2^(2/3) (-H + (3 kb t)/2)^2)/((1 - 2^(1/6))^4 K0^2 r^4) + (
4 (-H + (3 kb t)/2)^3)/(
3 (1 - 2^(1/6))^6 K0^3 r^6) - (-H + (3 kb t)/2)^4/(
3 2^(2/3) (1 - 2^(1/6))^8 K0^4 r^8)) +
kb ln[2 Sqrt[2] c ((exp kb pi)/(K0 t))^(3/2)])}}

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Subject (listing for 'Probleme with solve')
Author Date Posted
Probleme with solve Thibault 07/01/13 08:26am
Re: Probleme with solve jf 07/01/13 5:23pm
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