# Tag Info

### How to fix this "wrong" analytical integral evaluation?

I usually try a path integral in such cases: ...
• 240k

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• 14.8k

### How to fix this "wrong" analytical integral evaluation?

Since at least version 11, the complex elliptic integrals and Jacobi elliptic functions are so buggy that they are useless. One is working in an algebraic field with square roots and equalities of ...
• 4,083
1 vote
Accepted

### FullSimplify returns complex number even though assumptions make it real

Your discriminant is TeXForm[List@@\[Delta]]/.{\\ \\:> \\ \\ +} \begin{array}{l} \kappa _g^4 \left(\kappa _r-\kappa _{\Pi }\right){}^2 \\ + \kappa _r^4 \...
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• 161k

### Symbolic derivatives with vectors and matrices

Version 14.1 introduced Symbolic Vectors, Matrices and Arrays, which you can also use to calculate symbolic derivatives of vectors and matrices. ...
• 29.5k

### Symbolic linear algebra gradients/matrix calculus

Use the new-in-14.1 VectorSymbol: ...
• 67.2k
1 vote
Accepted

### Showing symbolic equality up to some transformation of variables

I guess there is no easy way to tackle such problem in general. But in the try and error approach I will explain below, Mathematica will be of great help. You want the change of variables (a1,a2,a3) ...
• 2,005
Accepted

### How to simplify and rearrange a mathematical expression with quantities that have subscripts

If you just need to print that result, you can do the following: ...
• 28.4k
Accepted

### How to handle undefined Integral results for excluded conditions in Mathematica

To get rid of condition like If I use a trick: ...
• 14.8k