# Questions tagged [symbolic]

For questions about symbolic computation, as opposed to numerical computations.

1,000 questions
Filter by
Sorted by
Tagged with
49 views

### Define some variables to be real within the whole notebook

I want to define some variables to be real within the whole notbook? How can I do this? In the following you can find my code. I think the last step will be computed in seconds when I tell mathematica ...
163 views

### On double summation with Mathematica

Today I wanted to evaluate this sum using Mathematica: $$f(a,b):=\sum_{(k,l)\in\mathbb{Z}^2,\ l\ne0}\frac{1}{(2 i k a \pi + l b) (2 i (k - l) a \pi + l b)}$$ ...
89 views

### Plotting solution to Differential Equation with separable variables [closed]

Got this differential equation $$y'=\frac{-x^2(y+1)}{y^2(x-1)}$$ If I try directly to DSolve it ...
49 views

94 views

### Finding sub-expressions that simplify larger formula

If I use FullSimplify on a large formula it will consequently return a much smaller expression. However, suppose I notice the simplified expression can benefit from ...
355 views

### Evaluate Only Part of a Function

I have a list of functions, each containing none or more of the functions Plus, Times, ...
143 views

### differential equation solution with DSolve

I have a problem for my work, I need to calculate this diff. equation I have, ...
105 views

### Replacing one of the integrals in the multiple integral with an analytical solution

Problem consist in simplifying complicated multiple numerical integral, where I know analytical solution for a subset of them. Integrand is of the form ...
328 views

### Analytically solving of two coupled second order nonlinear ODEs

I have two coupled non linear second order differential equation. ...
111 views

### Fourier Transform of a symbolic expression

Hello I would like to do the Fourier Transform of H1'[t - L2[t]/c - L2primo[t]/c] I know that its transform has to be: ...
67 views

### Finding symbolic series coefficients

Is there any way to get the symbolic form of a series? For simple series this seems possible e.g. SeriesCoefficent[Exp[x],{x,0,n}] tells me that the general ...
72 views

I know similar questions have been asked before about bugs in Integrate, but I'm not sure what the particular problem is here (and whether or not there is indeed a bug). When I perform the integral: ...
I am working with the matrices of the form $u = \begin{pmatrix}Y &y\\0 & Y\end{pmatrix}$, and I have an operator $a$ such that $au=\begin{pmatrix}Y & ay\\0 & Y\end{pmatrix}$. Since y ...