SLARRR(3)

✨ SLARRR(3) — Library Functions Manual ✨

Bestie, welcome to the Library Functions Manual page for SLARRR(3); its page source is /home/abui...RC/slarrr.f(3). This one is lowkey all about deciding if your symmetric tridiagonal matrix T deserves the expensive accuracy treatment 💅.

🌸 NAME 🌸

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/slarrr.f — yes, that whole absolute path is the NAME. It’s the slarrr.f source file, main character energy.

✨ SYNOPSIS ✨

💫 Functions/Subroutines 💫

• subroutine SLARRR (n, d, e, info) — SLARRR performs tests to decide whether the symmetric tridiagonal matrix T warrants expensive computations which guarantee high relative accuracy in the eigenvalues. No cap, that is the entire vibe check.

💅 Function/Subroutine Documentation 💅

🎀 subroutine SLARRR 🎀

Exact signature, bestie:

subroutine SLARRR (integer n, real, dimension( * ) d, real, dimension( * ) e, integer info)

SLARRR performs tests to decide whether the symmetric tridiagonal matrix T warrants expensive computations which guarantee high relative accuracy in the eigenvalues. That’s the whole mission 🫶.

🦋 Purpose 🦋

Perform tests to decide whether the symmetric tridiagonal matrix T warrants expensive computations which guarantee high relative accuracy in the eigenvalues.

🍓 Parameters 🍓

• N — N is INTEGER. The order of the matrix. N > 0.
• D — D is REAL array, dimension (N). The N diagonal elements of the tridiagonal matrix T.
• E — E is REAL array, dimension (N). On entry, the first (N-1) entries contain the subdiagonal elements of the tridiagonal matrix T; E(N) is set to ZERO.
• INFO — INFO is INTEGER.
  • INFO = 0(default) : the matrix warrants computations preserving relative accuracy.
  • INFO = 1 : the matrix warrants computations guaranteeing only absolute accuracy.

👑 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 📌

Definition at line 93 of file slarrr.f.

💖 Author 💖

Generated automatically by Doxygen for LAPACK from the source code.

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xoxo, this page is LAPACK Version 3.12.0, footer path /home/abui...RC/slarrr.f(3) — slay and goodbye 💜🦋