DGET34(3)

💖 Bestie, welcome to DGET34(3) — a page from the Library Functions Manual, and the main character here is the DGET34 routine. Not me being obsessed with a manpage, but here we are. 💅

🌸 NAME 🌸

The NAME section is literally this source file path, bestie — no cap:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/EIG/dget34.f

✨ SYNOPSIS ✨

🫶 Functions/Subroutines 🫶

subroutine DGET34 (rmax, lmax, ninfo, knt)
    DGET34

The short description under that signature is just DGET34. It's giving "same name, no extra notes," fr fr. 🫶

💖 Function/Subroutine Documentation 💖

subroutine DGET34 (double precision rmax, integer lmax, integer, dimension(
    2 ) ninfo, integer knt)
    DGET34

🎀 Purpose 🎀

Okay so DGET34 tests DLAEXC, a routine for swapping adjacent blocks (either 1 by 1 or 2 by 2) on the diagonal of a matrix in real Schur form. Thus, DLAEXC computes an orthogonal matrix Q such that:

Q' * [ A B ] * Q  = [ C1 B1 ]
     [ 0 C ]        [ 0  A1 ]

Here C1 is similar to C and A1 is similar to A. Both A and C are assumed to be in standard form (equal diagonal entries and offdiagonal with differing signs), and A1 and C1 are returned with the same properties.

Obsessed with this part: the test code verifies these last assertions, as well as that the residual in the above equation is small. Iconic. ✨

🦋 Parameters 🦋

• RMAX — DOUBLE PRECISION. Value of the largest test ratio.
• LMAX — INTEGER. Example number where largest test ratio achieved.
• NINFO — INTEGER array, dimension (2). NINFO(J) is the number of examples where INFO=J occurred.
• KNT — 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 dget34.f.

⭐ Author ⭐

Generated automatically by Doxygen for LAPACK from the source code.

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💖 That's the whole page, bestie. The footer says LAPACK Version 3.12.0 and source path /home/abui...IG/dget34.f(3) — lowkey no date shown in the footer. Bye! 💖