dlagtf(3) on Linux
The text b2663cef9395, as Debian 3.0 (Woody) shipped it.
factorize the matrix (T - lambda*I), where T is an n by n tridiagonal matrix and lambda is a scalar, as T - lambda*I = PLU,
The text b2663cef9395, as Debian 3.0 (Woody) shipped it.
factorize the matrix (T - lambda*I), where T is an n by n tridiagonal matrix and lambda is a scalar, as T - lambda*I = PLU,