TESTING/EIG/dget32.f(3)

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version 3.12.1 · 3 versions
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💖 NAME 💖

TESTING/EIG/dget32.f is the page, bestie — and yes, it’s living under the Library Functions Manual. Manual name folded in near the top, exactly as requested. Slay.

✨ SYNOPSIS ✨

Functions/Subroutines

  • subroutine dget32 (rmax, lmax, ninfo, knt) — DGET32

🧚 Function/Subroutine Documentation 🧚

subroutine dget32 (double precision rmax, integer lmax, integer ninfo, integer knt)

DGET32

🎀 Purpose:

Okay so DGET32 tests DLASY2, a routine for solving

op(TL)*X + ISGN*X*op(TR) = SCALE*B

where TL is N1 by N1, TR is N2 by N2, and N1,N2 =1 or 2 only. X and B are N1 by N2, op() is an optional transpose, and ISGN = 1 or -1. SCALE is chosen less than or equal to 1 to avoid overflow in X.

The test condition is that the scaled residual

norm( op(TL)*X + ISGN*X*op(TR) = SCALE*B )
     / ( max( ulp*norm(TL), ulp*norm(TR)) * norm(X), SMLNUM )

should be on the order of 1. Here, ulp is the machine precision. Also, it is verified that SCALE is less than or equal to 1, and that XNORM = infinity-norm(X).

🌸 Parameters 🌸

  • RMAX — RMAX is DOUBLE PRECISION; value of the largest test ratio.
  • LMAX — LMAX is INTEGER; example number where largest test ratio achieved.
  • NINFO — NINFO is INTEGER; number of examples returned with INFO.NE.0.
  • KNT — KNT is INTEGER; total number of examples tested.

👑 Author 👑

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

Definition at line 81 of file dget32.f.

🦋 Author 🦋

Generated automatically by Doxygen for LAPACK from the source code.

Made with LAPACK Version 3.12.0, from TESTING/EIG/dget32.f(3) — byeee bestie, mwah 💋✨🫶

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