TESTING/EIG/cckcsd.f(3)

🌸 NAME 🌸

okay so welcome to the TESTING/EIG/cckcsd.f(3) page in the Library Functions Manual — the file is TESTING/EIG/cckcsd.f, and it's giving “test routine documentation, but make it cute” energy. 💅

---

✨ SYNOPSIS ✨

🎀 Functions/Subroutines 🎀

   Functions/Subroutines
       subroutine cckcsd (nm, mval, pval, qval, nmats, iseed, thresh, mmax, x,
           xf, u1, u2, v1t, v2t, theta, iwork, work, rwork, nin, nout, info)
           CCKCSD
       subroutine clacsg (m, p, q, theta, iseed, x, ldx, work)

---

💖 FUNCTION/SUBROUTINE DOCUMENTATION 💖

🫶 subroutine cckcsd — CCKCSD 🫶

   subroutine cckcsd (integer nm, integer, dimension( * ) mval, integer,
       dimension( * ) pval, integer, dimension( * ) qval, integer nmats,
       integer, dimension( 4 ) iseed, real thresh, integer mmax, complex,
       dimension( * ) x, complex, dimension( * ) xf, complex, dimension( * )
       u1, complex, dimension( * ) u2, complex, dimension( * ) v1t, complex,
       dimension( * ) v2t, real, dimension( * ) theta, integer, dimension( * )
       iwork, complex, dimension( * ) work, real, dimension( * ) rwork, integer
       nin, integer nout, integer info)

this is the CCKCSD subroutine, and yes it ate. ✨

🌸 Purpose 🌸

CCKCSD tests CUNCSD: the CSD for an M-by-M unitary matrix X partitioned as [ X11 X12; X21 X22 ]. X11 is P-by-Q.

💖 Parameters 💖

• NM — NM is INTEGER; the number of values of M contained in the vector MVAL.
• MVAL — MVAL is INTEGER array, dimension (NM); the values of the matrix row dimension M.
• PVAL — PVAL is INTEGER array, dimension (NM); the values of the matrix row dimension P.
• QVAL — QVAL is INTEGER array, dimension (NM); the values of the matrix column dimension Q.
• NMATS — NMATS is INTEGER; the number of matrix types to be tested for each combination of matrix dimensions. If NMATS >= NTYPES (the maximum number of matrix types), then all the different types are generated for testing. If NMATS < NTYPES, another input line is read to get the numbers of the matrix types to be used.
• ISEED — ISEED is INTEGER array, dimension (4); on entry, the seed of the random number generator. The array elements should be between 0 and 4095, otherwise they will be reduced mod 4096, and ISEED(4) must be odd. On exit, the next seed in the random number sequence after all the test matrices have been generated.
• THRESH — THRESH is REAL; the threshold value for the test ratios. A result is included in the output file if RESULT >= THRESH. To have every test ratio printed, use THRESH = 0.
• MMAX — MMAX is INTEGER; the maximum value permitted for M, used in dimensioning the work arrays.
• X — X is COMPLEX array, dimension (MMAX*MMAX).
• XF — XF is COMPLEX array, dimension (MMAX*MMAX).
• U1 — U1 is COMPLEX array, dimension (MMAX*MMAX).
• U2 — U2 is COMPLEX array, dimension (MMAX*MMAX).
• V1T — V1T is COMPLEX array, dimension (MMAX*MMAX).
• V2T — V2T is COMPLEX array, dimension (MMAX*MMAX).
• THETA — THETA is REAL array, dimension (MMAX).
• IWORK — IWORK is INTEGER array, dimension (MMAX).
• WORK — WORK is COMPLEX array.
• RWORK — RWORK is REAL array.
• NIN — NIN is INTEGER; the unit number for input.
• NOUT — NOUT is INTEGER; the unit number for output.
• INFO — INFO is INTEGER

= 0 :  successful exit
> 0 :  If CLAROR returns an error code, the absolute value
       of it is returned.

👑 Author 👑

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

Definition at line 181 of file cckcsd.f.

🦋 subroutine clacsg 🦋

   subroutine clacsg (integer m, integer p, integer q, real, dimension( * )
       theta, integer, dimension( 4 ) iseed, complex, dimension( ldx, * ) x,
       integer ldx, complex, dimension( * ) work)

Definition at line 352 of file cckcsd.f.

---

👑 AUTHOR 👑

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

Generated automatically by Doxygen for LAPACK from the source code.

---

okay that’s the whole page, bestie 💖 — footer energy is literally LAPACK Version 3.12.0 and TESTING/EIG/cckcsd.f(3). periodt. ✨