TESTING/EIG/zget36.f(3)

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version 3.12.1 · 3 versions
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✨ TESTING/EIG/zget36.f ✨

okay so this is from the Library Functions Manual bestie, and it's literally the whole vibe for zget36 — a Fortran test routine that's out here doing the most to check if ZTREXC is behaving. no cap, it's giving "I test reordering routines so you don't have to" energy 💅

🌸 SYNOPSIS 🌸

🫶 Functions/Subroutines 🫶

  • subroutine zget36 (rmax, lmax, ninfo, knt, nin) — ZGET36

💖 Function/Subroutine Documentation 💖

subroutine zget36 (double precision rmax, integer lmax, integer ninfo,
    integer knt, integer nin)

ZGET36 — like, the main character of this whole page ✨

🎀 Purpose 🎀

okay so listen bestie, ZGET36 tests ZTREXC — that's the routine for reordering diagonal entries of a matrix in complex Schur form. so ZLAEXC computes a unitary matrix Q such that

Q' * T1 * Q  = T2

and where one of the diagonal blocks of T1 (the one at row IFST) has been moved to position ILST.

the test code verifies that the residual Q'*T1*Q-T2 is small, that T2 is in Schur form, and that the final position of the IFST block is ILST. slay, honestly 💅

the test matrices are read from a file with logical unit number NIN.

🦋 Parameters 🦋

  • RMAX — is DOUBLE PRECISION. value of the largest test ratio 💖
  • LMAX — is INTEGER. example number where largest test ratio achieved 🎯
  • NINFO — is INTEGER. number of examples where INFO is nonzero 😭
  • KNT — is INTEGER. total number of examples tested 🔥
  • 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 zget36.f. periodt 💅

🌈 Author 🌈

Generated automatically by Doxygen for LAPACK from the source code. it's giving "the robots did this one" energy ngl 🤖✨

and that's the whole page bestie! LAPACK Version 3.12.0, file TESTING/EIG/zget36.f(3) — go off and test those Schur forms, ily 🫶💖🎀
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