DGET40(3)

🌸 NAME 🌸

okay bestie, this is the DGET40(3) page from the Library Functions Manual — and the source file is literally:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/EIG/dget40.f

No cap, that full path is the whole NAME section vibe. 🫶

✨ SYNOPSIS ✨

Functions/Subroutines — the index came through:

       subroutine DGET40 (rmax, lmax, ninfo, knt, nin)
           DGET40

💅 Function/Subroutine Documentation 💅

The full signature, preserved exactly:

   subroutine DGET40 (double precision rmax, integer lmax, integer, dimension(
       2 ) ninfo, integer knt, integer nin)
       DGET40

🎯 Purpose 🎯

okay so DGET40 is out here testing DTGEXC, the routine for swapping adjacent blocks — either 1 by 1 or 2 by 2 — on the diagonal of a pencil in real generalized Schur form. The way that DTGEXC computes orthogonal matrices Q and Z such that:

    Q' * ( [ A B ], [ D E ] ) * Z  = ( [ C1 B1 ], [ F1 E1 ] )
         ( [ 0 C ]  [   F ] )        ( [ 0  A1 ]  [    D1]  )

where (C1,F1) is similar to (C,F) and (A1,D1) is similar to (A,D). Both (A,D) and (C,F) are assumed to be in standard form, and (A1,D1) and (C1,F1) are returned with the same properties. Slay. Periodt. 💅

🎀 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 array, dimension (2).
  • NINFO( 1 ) = DTGEXC without accumulation returned INFO nonzero
  • NINFO( 2 ) = DTGEXC with accumulation returned INFO nonzero
• KNT — KNT is INTEGER. Total number of examples tested.
• NIN — NIN is INTEGER. Input logical unit number.

🫶 Author 🫶

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

Definition at line 84 of file dget40.f.

💜 Author 💜

Generated automatically by Doxygen for LAPACK from the source code. Not me writing fanfic — that’s literally the line, bestie. 🫶

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and that’s the whole page! Footer tea: LAPACK, Version 3.12.0, source path /home/abui...IG/dget40.f(3). Stay iconic, and read the docs before you touch the pencil. 💖✨🎀