CUNG2R(3)

💅 CUNG2R(3) 💅

okay bestie, welcome to the Library Functions Manual page for CUNG2R(3). This is the LAPACK subroutine page, and it lives at the source file path below. iykyk ✨

🌸 NAME 🌸

/home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/cung2r.f

That's the file this page is about, literally — the CUNG2R source. 🫶

✨ SYNOPSIS ✨

subroutine CUNG2R (m, n, k, a, lda, tau, work, info)

🫶 Functions/Subroutines 🫶

• subroutine CUNG2R (m, n, k, a, lda, tau, work, info) — CUNG2R 💜

💖 Function/Subroutine Documentation 💖

subroutine CUNG2R (integer m, integer n, integer k, complex, dimension( lda,
       * ) a, integer lda, complex, dimension( * ) tau, complex, dimension( * )
       work, integer info)

CUNG2R — yes bestie, that's the whole signature. 🎀

🎀 Purpose 🎀

CUNG2R generates an m by n complex matrix Q with orthonormal columns. That matrix Q is defined as the first n columns of a product of k elementary reflectors of order m:

Q  =  H(1) H(2) . . . H(k)

...as returned by CGEQRF. slay. ✨

🍓 Parameters 🍓

• M — M is INTEGER; the number of rows of the matrix Q. M >= 0. 💖
• N — N is INTEGER; the number of columns of the matrix Q. M >= N >= 0. 🌸
• K — K is INTEGER; the number of elementary reflectors whose product defines the matrix Q. N >= K >= 0. 🦋
• A — A is COMPLEX array, dimension (LDA,N). On entry, the i-th column must contain the vector which defines the elementary reflector H(i), for i = 1,2,...,k, as returned by CGEQRF in the first k columns of its array argument A. On exit, the m by n matrix Q. 💅
• LDA — LDA is INTEGER; the first dimension of the array A. LDA >= max(1,M). 🎀
• TAU — TAU is COMPLEX array, dimension (K); TAU(i) must contain the scalar factor of the elementary reflector H(i), as returned by CGEQRF. 🫶
• WORK — WORK is COMPLEX array, dimension (N). 🌈
• INFO — INFO is INTEGER:
  • = 0: successful exit
  • < 0: if INFO = -i, the i-th argument has an illegal value

👑 Author 👑

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

Definition at line 113 of file cung2r.f. 📌

🧚 Author 🧚

Generated automatically by Doxygen for LAPACK from the source code. 🫡

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Bye bestie! This page is LAPACK Version 3.12.0, from /home/abui...RC/cung2r.f(3). The footer doesn't list a separate date, so no invented date energy here — just source/version tea and a cute sign-off. 💅✨