LAPACK
3.10.1
LAPACK: Linear Algebra PACKage

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Functions/Subroutines  
subroutine  zhetd2 (UPLO, N, A, LDA, D, E, TAU, INFO) 
ZHETD2 reduces a Hermitian matrix to real symmetric tridiagonal form by an unitary similarity transformation (unblocked algorithm). More...  