chpgv(3) on Linux
The text 620946b0c8d7, as Debian 1.3 (Bo) shipped it.
compute all the eigenvalues and, optionally, the eigenvectors of a complex generalized Hermitian-definite eigenproblem, of the form A*x=(lambda)*B*x, A*Bx=(lambda)*x, or B*A*x=(lambda)*x