## New answers tagged na.numerical-analysis

0
votes

### Approximation for complex variables

One place to start looking might be Trefethen's work, in particular Chebfun https://www.chebfun.org and the rational approximation AAA, as discussed in this retrospective: https://people.maths.ox.ac....

2
votes

### Converting an algebraic equation into a ODE

Disclaimer: I am not sure I understand what you mean by "algebraic equation". I don't know if you really mean functions that are expressible as roots of a polynomial equation. If that's the ...

3
votes

### Are the coefficients in the stationary phase approximation computed explicitly somewhere

The following is mostly adapted from [1] (I am the second co-author). Suppose
$$
\psi(x) \sim x^{-1+\beta/\rho} \sum_{j=0}^{\infty} \psi_j x^{j/\rho}, \quad
\phi(x) \sim x^{s/\rho} \sum_{j=0}^{\infty} ...

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