# Questions tagged [coefficients]

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### CoefficientRules for huge expressions

Is there some idea to get the coefficients for a very complicated, huge, and explicit polynomial expression to avoid insufficient memory problem? I am trying to use GroebnerBasis`DistributedTermsList ...
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### How to factor all coefficients of a multivariable into prime factors

I have several polynomials in 2 variables with integer coefficients, e.g., poly= -10 x - 10240 y^3 - 1520 x y^4; I'd like to convert all such polynomials into a ...
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### Rearranging similar terms in an equation

In a piece of code I am writing, I run into an equation of the form ...
248 views

### Solving for coefficients of a polynomial ansatz in a rational function

(This is now a solved problem by my own alternative methods, and using some more physical arguments to limit the complexity of the problem. However more generally, any answers and strategies would be ...
119 views

### Plotting double series

I am new and hoping a warm welcome from this platform. I am trying to plot the graph of double series in one variable $$\sum_{k=0}^{\infty} \sum_{j=0}^{\infty} C_{k,j} \exp(- 3^k 1.5^{j} x)$$ ...
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### constructing Matrix from coefficients of solution & assigning 0 for empty Cells [closed]

i tried to construct a matrix from the coefficients of my solution, but problem that; 1; how can i get coefficients out of Solve 2; some Matrix elements are empty so i must assign 0 in those empty ...
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### Constant term of Laurent polynomial in many variables

What is the quickest way to extract the constant term from a Laurent polynomial in two variables? For example $x+1 +x^{-2}y+x/y$ has constant term $+1$.
280 views

### How to using the method of undetermined coefficients in this equation?

I want to find the rational numbers $a$, $b$, $c$ satisfying the condition $$\displaystyle \int _ { 5 } ^ { 21 } \frac { \mathrm { d } x } { x \cdot \sqrt { x + 4 } } = a \ln 3 + b \ln 5 + c \ln 7.$$ ...
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### Extract terms containing a specific symbol from an expression

I would like to be able to extract terms that contain either a symbol or a small expression from a larger one. Example (with a somewhat complicated function to give the idea of what I am after): <...
431 views

### Create a polynomial from a list of coefficients [duplicate]

First I have to extract coefficients from a polynomial.Then I have to make a polynomial from by given list and show that they are identical. So I tried like this: ...
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### Coefficients of continuous wavelet transform

I am fiddling with wavelet coefficients in Mathematica, and for simplicty only a real valued Wavlet. Lets say we have the data: ...
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### Solve PDE with complicated coefficient non-linearity [closed]

I wish to solve is the heat equation with solution-dependent coefficient. The equation along with BC's and IC's are as follows: \$\begin{equation} \frac{\partial P[x,t]}{\partial t}-\alpha[x,t]\frac{\...
506 views

### how to get coefficient list from a polynomial with negative powers

Say a polynomial x^2-x^(-2), I need to extract its coefficient. I tried the command CoefficientList[x^2-x^(-2)], but no result ...
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### Output of Apart as a list?

I have a rational funtion of one variable that I know will always have a simple partial fraction decomposition of the form $$\sum_{n=1}^N\frac{\alpha_n}{z- \beta_n},$$ but I do not know the values ...