CQRT05(3)

📦 version 3.12.0, in opensuse-leap 16.0

💅 CQRT05(3) — the one where we vibe-check CTPQRT and CTPMQRT

okay so bestie, gather round 🎀 this little icon lives in the LAPACK library functions manual corner of the universe, and its whole personality is testing other routines. Yes, it's a test routine testing test routines. Main character energy, honestly. It's a Fortran file, it ships with LAPACK, and it's here to tell you whether CTPQRT and CTPMQRT are actually slaying or just pretending. 👑

The file we're talking about, in all its absolute glory:

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/TESTING/LIN/cqrt05.f

✨ SYNOPSIS ✨

Functions / Subroutines 🦋

  • subroutine CQRT05 (m, n, l, nb, result) — literally the whole routine, that's it, that's the girl. 💖

🌸 Function/Subroutine Documentation 🌸

subroutine CQRT05 (integer m, integer n, integer l, integer nb, real, dimension(6) result)

CQRT05 — say hi 👋

🎯 Purpose

!>
!> CQRT05 tests CTPQRT and CTPMQRT.
!>

no cap, that's the entire mission statement. It puts CTPQRT and CTPMQRT through six whole tests and hands you back the receipts. 🧾✨

🧚 Parameters

  • M — is INTEGER. It's the number of rows in the lower part of the test matrix. So like, the bottom chunk. 🍓
  • N — is INTEGER. The number of columns in the test matrix. Yep, columns. The vertical vibes. 🌈
  • L — is INTEGER. The number of rows of the upper trapezoidal part of the lower test matrix. And bestie, the constraint is real: 0 <= L <= M. Don't push it. 💀
  • NB — is INTEGER. Block size of the test matrix, with NB <= N. That's the rule, respect it. 🎀
  • RESULT — is REAL array, dimension (6). This is where the six test results get parked, and honestly it's giving report card:
RESULT(1) = | A - Q R |
RESULT(2) = | I - Q^H Q |
RESULT(3) = | Q C - Q C |
RESULT(4) = | Q^H C - Q^H C |
RESULT(5) = | C Q - C Q |
RESULT(6) = | C Q^H - C Q^H |

Six results, one array, zero chill. Those should be tiny if everything's behaving — iykyk. 🔥

👑 Author

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

shoutout to the whole squad, fr fr 🫶

📍 Definition at line 79 of file cqrt05.f.

go look at line 79 if you want the source-code lore. 🙈

💜 Author

Generated automatically by Doxygen for LAPACK from the source code. so yeah, a robot wrote this one, not me — I'm just the messenger with better emoji choices. 😭

okay that's the whole page bestie, you ate. 🍓 LAPACK, Version 3.12.0 — and the footer on this thing was /home/abui...IN/cqrt05.f(3). periodt. 💅✨

📦 where this page comes from