Group Abstract Group Abstract

Message Boards Message Boards

Numerically solving non-linear algebraic equations

Vedat Erturk
Posted 4 years ago
Attachments:
equilibrium.nb
equilibrium.pdf
POSTED BY: Vedat Erturk
6 Replies
Sort By:
Jim Baldwin
Jim Baldwin
Posted 4 years ago
POSTED BY: Jim Baldwin
Vedat Erturk
Vedat Erturk
Posted 4 years ago

Hello, Jim Baldwin; Thank you for your reply. I guess the idea in your mind is the substitution method. By the way, the followings give result:

Solve[eq[[{1, 3}]], {I1, I2}]
Solve[eq[[{1, 4}]], {I1, I2}]
Solve[eq[[{1, 5}]], {I1, I2}]
Solve[eq[[{2, 3}]], {I1, I2}]
Solve[eq[[{2, 4}]], {I1, I2}]
Solve[eq[[{2, 5}]], {I1, I2}]
POSTED BY: Vedat Erturk
Vedat Erturk
Vedat Erturk
Posted 4 years ago

Please ignore NSolve. Solve does not give any solution,too.
POSTED BY: Vedat Erturk

What I mean, as noted in comments to the MSE x-post, is that it is impossible to return a numeric solution because several parameters are symbolic.
POSTED BY: Daniel Lichtblau

What kind of solution would you expect from NSolve?
POSTED BY: Daniel Lichtblau
Vedat Erturk
Vedat Erturk
Posted 4 years ago

Hello Daniel Lichtblau ,Thank you for your reply.I expect all solutions of the systems.In my system, S, e, I1, I2 and R are unknowns except the others.I can not see the results since the running of the code does not finish by NSolve and Solve.Thanks.
POSTED BY: Vedat Erturk
Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Tag limit exceeded
Note: Only the first five people you tag will receive an email notification; the other tagged names will appear as links to their profiles.
Reply Preview
Attachments
Remove
or Discard