Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 3836 by [email protected]: Problem with solve() in sympy live
http://code.google.com/p/sympy/issues/detail?id=3836
I have tried to solve this systema of equations in sympy live:
U_A,U_B,U_C,U_D,I_AB,I_OC,I_BD=symbols('U_A U_B U_C U_D I_AB I_OC I_BD')
solve([-I_AB-1/4-U_B/4, I_AB-U_B/2-I_BD, (3/8)*U_B+(15/8)+I_OC,
I_BD-(25/8)-(3/8)*U_B, U_D-U_B-10, U_A-U_B-10, U_C-5],
[U_A,U_B,U_C,U_D,I_AB,I_OC,I_BD])
And it gives a wrong solution:
{I_AB: 1, I_BD: 3, I_OC: -1, U_A: 6, U_B: -4, U_C: 5.0, U_D: 6}
However in isympy the solution is correct:
{I_AB: 0.5, I_BD: 2.0, I_OC: -0.75, U_A: 7.0, U_B: -3.0, U_C: 5, U_D: 7.0}
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