zptcon(3) on Linux
The text ab00162f7722, as Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
compute the reciprocal of the condition number (in the 1-norm) of a complex Hermitian positive definite tridiagonal matrix using the factorization A = L*D*L**H or A = U**H*D*U computed by ZPTTRF