LAPACK
3.6.1
LAPACK: Linear Algebra PACKage

Functions  
subroutine  sptsv (N, NRHS, D, E, B, LDB, INFO) 
SPTSV computes the solution to system of linear equations A * X = B for PT matrices More...  
subroutine  sptsvx (FACT, N, NRHS, D, E, DF, EF, B, LDB, X, LDX, RCOND, FERR, BERR, WORK, INFO) 
SPTSVX computes the solution to system of linear equations A * X = B for PT matrices More...  
This is the group of real solve driver functions for PT matrices