TESTING/EIG/ssxt1.f(3)

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version 3.12.1 · 2 versions
, in arch rolling

💖 NAME 💖

okay bestie, welcome to the Library Functions Manual page for TESTING/EIG/ssxt1.f(3) — manual name folded in, cute and all. The function living here is ssxt1, and yes, it's a whole vibe.

🌸 SYNOPSIS 🌸

Functions/Subroutines

the synopsis is giving:

real function ssxt1 (ijob, d1, n1, d2, n2, abstol, ulp, unfl)
    SSXT1

SSXT1 — that's the name, periodt.

💅 Function/Subroutine Documentation 💅

here's the full signature, no cap:

real function ssxt1 (integer ijob, real, dimension( * ) d1, integer n1,
    real, dimension( * ) d2, integer n2, real abstol, real ulp, real unfl)
    SSXT1

SSXT1 again, because the docs said so.

✨ Purpose ✨

okay so SSXT1 computes the difference between a set of eigenvalues. The result is returned as the function value. The IJOB energy is:

IJOB = 1:   Computes   max { min | D1(i)-D2(j) | }
                        i     j

IJOB = 2:   Computes   max { min | D1(i)-D2(j) | /
                        i     j
                             ( ABSTOL + |D1(i)|*ULP ) }

that's the whole purpose, bestie. slay.

🎀 Parameters 🎀

  • IJOB — INTEGER. Specifies the type of tests to be performed. (See above.)
  • D1 — REAL array, dimension (N1). The first array. D1 should be in increasing order, i.e., D1(j) <= D1(j+1).
  • N1 — INTEGER. The length of D1.
  • D2 — REAL array, dimension (N2). The second array. D2 should be in increasing order, i.e., D2(j) <= D2(j+1).
  • N2 — INTEGER. The length of D2.
  • ABSTOL — REAL. The absolute tolerance, used as a measure of the error.
  • ULP — REAL. Machine precision.
  • UNFL — REAL. The smallest positive number whose reciprocal does not overflow.

👑 Author 👑

shoutout to the authors:

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

Definition at line 104 of file ssxt1.f.

🦋 Author 🦋

Generated automatically by Doxygen for LAPACK from the source code.

that's the whole page, bestie — source/version is LAPACK Version 3.12.0, and the footer was giving TESTING/EIG/ssxt1.f(3). no date on the footer, so I'm not inventing one. byeee 💖🫶

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