SLASQ4(3)

📦 version 3.12.0, in opensuse-leap 16.0

💅 SLASQ4(3) — Library Functions Manual 💅

okay so bestie, this is the manual page for SLASQ4(3), and the manual name folded in here is Library Functions Manual. The header/footer path is /home/abui...RC/slasq4.f(3) — noted, no cap. 🫶

this is low-level LAPACK territory, so keep your eyes on the types and indices 💀

🌸 NAME 🌸

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/slasq4.f

That’s the file path, periodt. 💖

✨ SYNOPSIS ✨

🎀 Functions/Subroutines 🎀

subroutine SLASQ4 (i0, n0, z, pp, n0in, dmin, dmin1, dmin2, dn, dn1,
    dn2, tau, ttype, g)

SLASQ4 computes an approximation to the smallest eigenvalue using values of d from the previous transform. Used by sbdsqr. 💅

🦋 Function/Subroutine Documentation 🦋

🧚 subroutine SLASQ4 🧚

subroutine SLASQ4 (integer i0, integer n0, real, dimension( * ) z, integer
    pp, integer n0in, real dmin, real dmin1, real dmin2, real dn, real dn1,
    real dn2, real tau, integer ttype, real g)

SLASQ4 computes an approximation to the smallest eigenvalue using values of d from the previous transform. Used by sbdsqr. ✨

🎀 Purpose: 🎀

SLASQ4 computes an approximation TAU to the smallest eigenvalue using values of d from the previous transform. 🌸

🌈 Parameters 🌈

  • I0 — I0 is INTEGER. First index. 👑
  • N0 — N0 is INTEGER. Last index. ✨
  • Z — Z is REAL array, dimension ( 4*N0 ). Z holds the qd array. 🦋
  • PP — PP is INTEGER. PP=0 for ping, PP=1 for pong. 🎀
  • N0IN — N0IN is INTEGER. The value of N0 at start of EIGTEST. 💅
  • DMIN — DMIN is REAL. Minimum value of d. 🌸
  • DMIN1 — DMIN1 is REAL. Minimum value of d, excluding D( N0 ). 💖
  • DMIN2 — DMIN2 is REAL. Minimum value of d, excluding D( N0 ) and D( N0-1 ). 🫶
  • DN — DN is REAL. d(N). ⭐
  • DN1 — DN1 is REAL. d(N-1). 🌈
  • DN2 — DN2 is REAL. d(N-2). 🍓
  • TAU — TAU is REAL. This is the shift. 🔥
  • TTYPE — TTYPE is INTEGER. Shift type. 👑
  • G — G is REAL. G is passed as an argument in order to save its value between calls to SLASQ4. 💜

👑 Author 👑

  • Univ. of Tennessee
  • Univ. of California Berkeley
  • Univ. of Colorado Denver
  • NAG Ltd.

🍓 Further Details: 🍓

CNST1 = 9/16 🍓

Definition at line 149 of file slasq4.f.

💀 Author 💀

Generated automatically by Doxygen for LAPACK from the source code.

okay that’s the whole page, bestie 💖 — cute sign-off realness: LAPACK, Version 3.12.0, and the footer path /home/abui...RC/slasq4.f(3). There’s no separate date line in the original, so no invented date here 🫶✨

📦 where this page comes from