TESTING/EIG/cget35.f(3)

💖 TESTING/EIG/cget35.f(3) 💖

Ok bestie, we're in the Library Functions Manual and this page is literally TESTING/EIG/cget35.f(3). It's giving Fortran test-subroutine main-character energy, no cap. 🎀

🎀 NAME 🎀

TESTING/EIG/cget35.f

✨ SYNOPSIS ✨

🧚 Functions/Subroutines

subroutine cget35 (rmax, lmax, ninfo, knt, nin)
    CGET35

🌸 Function/Subroutine Documentation 🌸

💅 subroutine cget35

subroutine cget35 (real rmax, integer lmax, integer ninfo, integer knt,
     integer nin)
    CGET35

🎯 Purpose

Ok so CGET35 tests CTRSYL, a routine for solving the Sylvester matrix equation:

op(A)*X + ISGN*X*op(B) = scale*C,

Here's the vibe: A and B are assumed to be in Schur canonical form, op() represents an optional transpose, and ISGN can be -1 or +1. scale is an output less than or equal to 1, chosen to avoid overflow in X. 🔥

The test code verifies that the following residual is order 1:

norm(op(A)*X + ISGN*X*op(B) - scale*C) /
    (EPS*max(norm(A),norm(B))*norm(X))

That's the whole point, and it ate. 💅

🧾 Parameters

• RMAX — is REAL; 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 83 of file cget35.f.

🫶 Author

Generated automatically by Doxygen for LAPACK from the source code.

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