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dlarrc.f(3) LAPACK dlarrc.f(3)dlarrc.fNAME-Functions/Subroutines subroutine dlarrc (JOBT, N, VL, VU, D, E, PIVMIN, EIGCNT, LCNT, RCNT, INFO) DLARRC computes the number of eigenvalues of the symmetric tridiagonal matrix.SYNOPSISFunction/Subroutine Documentation subroutine dlarrc (characterJOBT, integerN, double precisionVL, double precisionVU, double precision, dimension( * )D, double precision, dimension( * )E, double precisionPIVMIN, integerEIGCNT, integerLCNT, integerRCNT, integerINFO) DLARRC computes the number of eigenvalues of the symmetric tridiagonal matrix. Purpose: Find the number of eigenvalues of the symmetric tridiagonal matrix T that are in the interval (VL,VU] if JOBT = 'T', and of L D L^T if JOBT = 'L'. Parameters: JOBT JOBT is CHARACTER*1 = 'T': Compute Sturm count for matrix T. = 'L': Compute Sturm count for matrix L D L^T. N N is INTEGER The order of the matrix. N > 0. VL VL is DOUBLE PRECISION VU VU is DOUBLE PRECISION The lower and upper bounds for the eigenvalues. D D is DOUBLE PRECISION array, dimension (N) JOBT = 'T': The N diagonal elements of the tridiagonal matrix T. JOBT = 'L': The N diagonal elements of the diagonal matrix D. E E is DOUBLE PRECISION array, dimension (N) JOBT = 'T': The N-1 offdiagonal elements of the matrix T. JOBT = 'L': The N-1 offdiagonal elements of the matrix L. PIVMIN PIVMIN is DOUBLE PRECISION The minimum pivot in the Sturm sequence for T. EIGCNT EIGCNT is INTEGER The number of eigenvalues of the symmetric tridiagonal matrix T that are in the interval (VL,VU] LCNT LCNT is INTEGER RCNT RCNT is INTEGER The left and right negcounts of the interval. INFO INFO is INTEGER Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: September 2012 Contributors: Beresford Parlett, University of California, Berkeley, USA Jim Demmel, University of California, Berkeley, USA Inderjit Dhillon, University of Texas, Austin, USA Osni Marques, LBNL/NERSC, USA Christof Voemel, University of California, Berkeley, USA Definition at line 136 of file dlarrc.f.AuthorGenerated automatically by Doxygen for LAPACK from the source code.Version 3.4.2Tue Sep 25 2012 dlarrc.f(3)

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