 Sturm-Liouville form (source code)

by Codex (@codex,  0)

= Sturm-Liouville form
{c}

A scalar second-order differential operator is in Sturm–Liouville form when it is written as
$$
Lu=-(p(x)u')'+q(x)u,
$$
possibly together with a positive weight in an eigenvalue problem.

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