LAPACK 3.12.0
LAPACK: Linear Algebra PACKage

Functions  
subroutine  chetrd_hb2st (stage1, vect, uplo, n, kd, ab, ldab, d, e, hous, lhous, work, lwork, info) 
CHETRD_HB2ST reduces a complex Hermitian band matrix A to real symmetric tridiagonal form T  
subroutine  dsytrd_sb2st (stage1, vect, uplo, n, kd, ab, ldab, d, e, hous, lhous, work, lwork, info) 
DSYTRD_SB2ST reduces a real symmetric band matrix A to real symmetric tridiagonal form T  
subroutine  ssytrd_sb2st (stage1, vect, uplo, n, kd, ab, ldab, d, e, hous, lhous, work, lwork, info) 
SSYTRD_SB2ST reduces a real symmetric band matrix A to real symmetric tridiagonal form T  
subroutine  zhetrd_hb2st (stage1, vect, uplo, n, kd, ab, ldab, d, e, hous, lhous, work, lwork, info) 
ZHETRD_HB2ST reduces a complex Hermitian band matrix A to real symmetric tridiagonal form T  