SLARRC(3)

💖 NAME 💖

okay so this is the slarrc.f(3) page from the Library Functions Manual 💅 and the NAME section is literally this path, no cap:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/slarrc.f

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✨ SYNOPSIS ✨

🧚 Functions/Subroutines 🧚

subroutine SLARRC (jobt, n, vl, vu, d, e, pivmin, eigcnt, lcnt, rcnt,
    info)

SLARRC computes the number of eigenvalues of the symmetric tridiagonal matrix. bestie, that's the whole vibe 💫

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🫶 Function/Subroutine Documentation 🫶

subroutine SLARRC (character jobt, integer n, real vl, real vu, real,
    dimension( * ) d, real, dimension( * ) e, real pivmin, integer eigcnt,
    integer lcnt, integer rcnt, integer info)

SLARRC computes the number of eigenvalues of the symmetric tridiagonal matrix. periodt 💅

🎯 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'. like, that's the whole assignment bestie ✨

🌈 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 REAL. The lower bound for the eigenvalues.

💜 VU

VU is REAL. The upper bound for the eigenvalues.

💜 D

D is REAL 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 REAL 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 REAL. 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.

🌸 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 135 of file slarrc.f.

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🌟 Author 🌟

Generated automatically by Doxygen for LAPACK from the source code.

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okay that's the whole page, bestie 🫶 the footer vibes are LAPACK Version 3.12.0 and /home/abui...RC/slarrc.f(3) — iconic, bye! 💖