# Questions tagged [symbolic]

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

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### Compare the coefficient in same part of the equations

I want to use Mathematica to do certain calculations. Below is a minimal example, my goal is to solve the equations that result from comparing the coefficients of both polynomials ...
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### Take a specific part of a matrix, excluding the external brackets [duplicate]

I have a little manipulation problem. I have the following matrix: ...
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### How to solve this infinite family of equations?

Is there any way to do a problem like this with MMa? I have an infinte set of coupled equations. j is a real integer index where $-\infty<j<\infty$. {a,b,c,d,f} are variables, and K's are ...
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### Vectan.m in Mathematica12 - returns VPValue instead of VP (same with SP etc) [closed]

for years I was using Vectan.m to do analytical vector calculations. There seem to be a problem in Mathematica 12 (on Mac). All loads well, but then instead of VP[a,b] it returns VPValue[a, b]: <&...
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### Problem with Analytical Integration with Constant

Could you help me out on how to integrate this long equation with constant as it is indefinite integral so I assumed I could not use numerical integration (eg: Simpsons's 3/8 Rule or Trapezoidal Rule) ...
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### GeneratedParameters in Integrate

I defined a function of two variables, let's say u[x_, y_] := 4 x^4 + 6 x y - 24 x^2 y^2 + 4 y^4 I want to partial integrate (with respect to y) the partial derivative of u with respect to x obtaining ...
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### Pattern matching problems involving FullForm and Plus and Times

I am trying to match an expression that will be a sum of more than one terms, with the last one being a product. For example, the objecta+b+x*y. I am using the ...
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### Type formation rules for 1-position expressions

I made a summary of the rules for formation of types for simple 1-position expressions, as I understand them. Here it is in textual form: A symbol, say, α, is a discrete entity, represented by a ...
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### Why does explicit Dirichlet Transform of Liouville Lambda not evaluate?

I have four expressions for the Dirichlet Transform of the Liouville-Lambda function, but one form does not evaluate, any ideas why and what could be done?
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### How to symbolically evaluate expression within If[]?

I have a function, say f, that needs to take one of two symbolic forms depending on the value of its inputs. This function is part of a very large expression, and I'...
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### Mathematica's evaluation of nested summations

As suggested there, here is a copy of the question I've posted on Math.Stackexchange. Suppose we want to count the number of instructions executed by the following Python code: ...