/home/abui.../cunbdb5.f(3)

🎀 NAME 🎀

okay bestie, this page is literally about the file at /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/SRC/cunbdb5.f — and it lives in the Library Functions Manual as cunbdb5.f(3). Main-character Fortran subroutine energy, no cap. 💖

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🌸 SYNOPSIS 🌸

🧚 Functions/Subroutines 🧚

       subroutine CUNBDB5 (m1, m2, n, x1, incx1, x2, incx2, q1, ldq1, q2, ldq2,
           work, lwork, info)
           CUNBDB5

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💅 Function/Subroutine Documentation 💅

   subroutine CUNBDB5 (integer m1, integer m2, integer n, complex, dimension(*)
       x1, integer incx1, complex, dimension(*) x2, integer incx2, complex,
       dimension(ldq1,*) q1, integer ldq1, complex, dimension(ldq2,*) q2,
       integer ldq2, complex, dimension(*) work, integer lwork, integer info)
       CUNBDB5

✨ Purpose ✨

So CUNBDB5 orthogonalizes the column vector

X = [ X1 ]
    [ X2 ]

with respect to the columns of

Q = [ Q1 ] .
    [ Q2 ]

The columns of Q must be orthonormal. 💅

If the projection is zero according to Kahan’s criterion, then some other vector from the orthogonal complement is returned. This vector is chosen in an arbitrary but deterministic way. 🔥

🍓 Parameters 🍓

• M1 — M1 is INTEGER. The dimension of X1 and the number of rows in Q1. Constraint: 0 <= M1. 💖
• M2 — M2 is INTEGER. The dimension of X2 and the number of rows in Q2. Constraint: 0 <= M2. 💖
• N — N is INTEGER. The number of columns in Q1 and Q2. Constraint: 0 <= N. ✨
• X1 — X1 is COMPLEX array, dimension (M1). On entry, the top part of the vector to be orthogonalized. On exit, the top part of the projected vector. 🦋
• INCX1 — INCX1 is INTEGER. Increment for entries of X1. 🌸
• X2 — X2 is COMPLEX array, dimension (M2). On entry, the bottom part of the vector to be orthogonalized. On exit, the bottom part of the projected vector. 🦋
• INCX2 — INCX2 is INTEGER. Increment for entries of X2. 🌸
• Q1 — Q1 is COMPLEX array, dimension (LDQ1, N). The top part of the orthonormal basis matrix. 👑
• LDQ1 — LDQ1 is INTEGER. The leading dimension of Q1. Constraint: LDQ1 >= M1. 💅
• Q2 — Q2 is COMPLEX array, dimension (LDQ2, N). The bottom part of the orthonormal basis matrix. 👑
• LDQ2 — LDQ2 is INTEGER. The leading dimension of Q2. Constraint: LDQ2 >= M2. 💅
• WORK — WORK is COMPLEX array, dimension (LWORK). 🫶
• LWORK — LWORK is INTEGER. The dimension of the array WORK. Constraint: LWORK >= N. ✨
• INFO — INFO is INTEGER. = 0: successful exit. < 0: if INFO = -i, the i-th argument had an illegal value. 😭

👑 Author 👑

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

Definition at line 154 of file cunbdb5.f. 📍

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🌈 Author 🌈

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

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and that’s the whole page, bestie! 🫶 Shoutout to the footer tea: LAPACK Version 3.12.0 and /home/abui.../cunbdb5.f(3). Periodt. 💅✨