12 questions linked to/from How to eliminate variables when using Solve[]
67 views

### A specific usage of "Solve" function [duplicate]

It is something from Simplifying polynomials with conditions on variables, that intend to minimize the number of variables. The problem is the usage of Solve". I know how to solve equations, ...
• 115
17k views

### What are some useful, undocumented Mathematica functions?

There have already been some questions about some undocumented functionality in Mathematica. Such as (please add to these lists!) How can one find undocumented options or option values in Mathematica?...
7k views

### How to solve an overdetermined system in Mathematica

I would like to understand the reasons and find a way to avoid such behaviour of the Solve function in Mathematica 8. ...
• 121
2k views

### Behavior of Reduce with variables as domain

When using Reduce, I accidentally put a set of variables as the domain. To my surprise, it not only seems that Reduce expects ...
• 1,752
383 views

### Rewriting algebraic expressions as combinations of other expressions

I would like to write x^5 + 1/x^5 in terms of x^2 + 1/x^2, x^3 + 1/x^3 and ...
• 219
1 vote
472 views

### How to speed or help Solve[] when it is stuck?

The code below generates a system of equations that I need to Solve[] for {c[5], c[6], c[7], c[8]} in terms of {c[1], c[2], c[3], c[4]}. ...
• 4,632
164 views

### Arrange a system of differential equations to standard state-space equation form

I want to model an electrical circuit in the form of state-space equations, and I want to use Mathematica to solve the final equations, the circuit equations (from Kirchhoff's law) are shown below, ...
1 vote
109 views

• 476
1 vote
199 views

...
174 views

### solve nonlinear differential equations for some variables [closed]

I have a few nonlinear differential equations and some variables that I need them to be eliminated when I am calculating differential equations based on other 3 variables, but I can just get an answer ...
• 159
1 vote