cptsvx(3) on Linux
The text 4a69f54fa456, as Debian 1.3 (Bo) shipped it.
use the factorization A = L*D*L**H to compute the solution to a complex system of linear equations A*X = B, where A is an N-by-N Hermitian positive definite tridiagonal matrix and X and B are N-by-NRHS matrices