SRC/ztpttr.f(3)

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version 3.12.1 · 4 versions
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okay so bestie, this is the SRC/ztpttr.f(3) page from the Library Functions Manual ✨ and it's literally all about one subroutine. Buckle up, it's giving linear algebra but make it cute 💅

💖 NAME 💖

  • SRC/ztpttr.f — the file, periodt. That's the whole name section, no cap 💖

✨ SYNOPSIS ✨

💅 Functions/Subroutines 💅

subroutine ztpttr (uplo, n, ap, a, lda, info)

ZTPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR). 🫶

🦋 Function/Subroutine Documentation 🦋

subroutine ztpttr (character uplo, integer n, complex*16, dimension( * ) ap,
    complex*16, dimension( lda, * ) a, integer lda, integer info)

ZTPTTR copies a triangular matrix from the standard packed format (TP) to the standard full format (TR).

🌸 Purpose 🌸

ZTPTTR copies a triangular matrix A from standard packed format (TP) to standard full format (TR). 🫶

🎀 Parameters 🎀

  • UPLO — UPLO is CHARACTER*1; = 'U': A is upper triangular.; = 'L': A is lower triangular. 💖
  • N — N is INTEGER; the order of the matrix A. N >= 0. ✨
  • AP — AP is COMPLEX*16 array, dimension ( N*(N+1)/2 ), On entry, the upper or lower triangular matrix A, packed columnwise in a linear array. The j-th column of A is stored in the array AP as follows: if UPLO = 'U', AP(i + (j-1)*j/2) = A(i,j) for 1<=i<=j; and if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = A(i,j) for j<=i<=n. 🦋
  • A — A is COMPLEX*16 array, dimension ( LDA, N ) On exit, the triangular matrix A. If UPLO = 'U', the leading N-by-N upper triangular part of A contains the upper triangular part of the matrix A, and the strictly lower triangular part of A is not referenced. If UPLO = 'L', the leading N-by-N lower triangular part of A contains the lower triangular part of the matrix A, and the strictly upper triangular part of A is not referenced. 👑
  • LDA — LDA is INTEGER; the leading dimension of the array A. LDA >= max(1,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.

the whole academic squad showed up 🎓✨

Definition at line 103 of file ztpttr.f.

🌈 Author 🌈

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