LAPACK
3.6.1
LAPACK: Linear Algebra PACKage

Functions  
subroutine  cgtsv (N, NRHS, DL, D, DU, B, LDB, INFO) 
CGTSV computes the solution to system of linear equations A * X = B for GT matrices More...  
subroutine  cgtsvx (FACT, TRANS, N, NRHS, DL, D, DU, DLF, DF, DUF, DU2, IPIV, B, LDB, X, LDX, RCOND, FERR, BERR, WORK, RWORK, INFO) 
CGTSVX computes the solution to system of linear equations A * X = B for GT matrices More...  
This is the group of complex solve driver functions for GT matrices