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Questions tagged [coefficients]

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Solving the issues related to the Coefficient command?

I am trying to extract coefficients of a complex expression which is a polynomial in two variables $x,y$ and has max order up to $x^{18},y^{18}$. I am trying to get the coefficient of say $x$ , $x^2$, ...
32 views

Replacing factors that are only dependent on a single specific variable

I have expressions with terms that are products of factors. Some of the factors are expressions that depend on a single specific variable. I would like to replace those factors with constants and ...
37 views

How the terms are arranged in CoefficientList command?

I have an expression containing various orders (powers) of F[r]. Using CoefficientList, the output is a blue box which is ...
38 views

Coefficient Array from total derivative of expression

I have an expression $$\dot{r}\dot{\eta}+r^{2}\dot{\theta}\dot{\xi}=0$$ where $\eta$ and $\xi$ are both functions of $r,\theta$. In MM I wrote this as ...
43 views

80 views

Non constant coefficient in heat equation

I have to solve the following heat equation over a cylindrical domain. In cylindrical coordinates the PDE Equation reads: ...
73 views

Finding coefficient of exponent in an expression

I am trying to find coefficient of an exponent term in an expression. For example, consider tt = E^(I*T0*(ω+σ)); Doing ...