TESTING/EIG/dget33.f(3)

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version 3.12.1 · 3 versions
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💖 NAME 💖

okay bestie, meet TESTING/EIG/dget33.f! This page is TESTING/EIG/dget33.f(3) from the Library Functions Manual, and it's basically the group chat for DGET33 💅✨

✨ SYNOPSIS ✨

🎀 Functions/Subroutines 🎀

   Functions/Subroutines
       subroutine dget33 (rmax, lmax, ninfo, knt)
           DGET33

🦋 Function/Subroutine Documentation 🦋

   subroutine dget33 (double precision rmax, integer lmax, integer ninfo,
       integer knt)
       DGET33

✨ Purpose ✨

okay so DGET33 is the bestie that tests DLANV2, the routine for putting 2 by 2 blocks into standard form. In other words, it computes a two by two rotation

[[C,S]
[-S,C]]

where in

   [ C S ][T(1,1) T(1,2)][ C -S ] = [ T11 T12 ]
   [-S C ][T(2,1) T(2,2)][ S  C ]   [ T21 T22 ]

either

  1. T21=0 (real eigenvalues), or
  2. T11=T22 and T21*T12<0 (complex conjugate eigenvalues).

And yes, it also verifies that the residual is small. No cap 🔥

💅 Parameters 💅

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

👑 Author 👑

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

Definition at line 75 of file dget33.f.

🌈 Author 🌈

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