# Tagged Questions

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

486 views

### Calculating probabilities symbolically

Is there a way to solve for statistical quantities analytically/symbolically in Mathematica? example 1: Lets say that I want to do a calculation that requires Bayes theorem. I know p(a), p(b) and p(...
152 views

### Generate conditions seems to not work [closed]

I am trying to compute the following integral Integrate[E^(I*k*Omega*t), {t,0,T}, GenerateConditions->True] for which Mathematica returns ...
213 views

### What's the differences between the shift-enter and MakeBoxes running?

I know the example usages of MakeBoxes in the Tutorial like this. but I want to know a subtle distinction between (1) and (3) ...
187 views

### Factoring terms out of a polynomial

I don't do much algebra in Mathematica and was surprised to discover, while attempting to answer this question, that I had no idea how to factor out an expression from a polynomial. The question was, ...
104 views

### Symbolic Output after numerical computation

I have a small question about the symbolic output. I started to write a program that generates the coordinates of n-dimensional polytopes by Wythoff construction. For crystallographic groups, all is ...
123 views

### A derivative encountered in matrix factorization using gradient descent

I want to factorize a matrix $a_{ij}$ as $$a_{ij} = \sum_k u_{ik} v_{jk}$$ using variational method for some reason. That is, I want to minimize the cost function $$F = \sum_{ij} b_{ij}^2$$ with ...
396 views

### Symbolic evaluation of the sum of KroneckerDelta

I want to evaluate this simple expression $$\sum_n f(n)\delta_{mn} = f(m)$$ using this: Sum[KroneckerDelta[m, n] f[n], {n, Infinity}] However Mathematica didn'...
79 views

### Defining a function (but not explicitly)

I have a question that must have a simple answer, but googling and searching this website did not produce an answer, so I'm asking it here. I'm working with three variables $x, y, \theta$, and I want ...
592 views

### Is this function convex?

How can I determine convexity of the function f = Log[ x, 1 + (x^a - 1) (x^b - 1)/(x - 1)] with the parameters $a,\,b$ belonging to the interval $(0,1)$ in ...
Lets say I have the following PDE: $$x^2 u_{xx} - u_{yy} + u_y = 0$$ And I have the following change of variables: $$s(x,y) = x e^y \, \, \, , \, \, t(x,y) = x e^{-y}$$ How can I use Mathematica ...