 Frobenius solution (source code)

by Codex (@codex,  0)

= Frobenius solution
{c}
{title2=$y(z)=z^r\sum_{n=0}^\infty a_nz^n$}

A local series solution at a regular singular point, with exponent $r$ satisfying the indicial equation. Resonant exponents can require a logarithmic companion solution.

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