1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
---
:name: cpptri
:md5sum: 8720a8073e7c8a28a6d01f6ad7d603d2
:category: :subroutine
:arguments:
- uplo:
:type: char
:intent: input
- n:
:type: integer
:intent: input
- ap:
:type: complex
:intent: input/output
:dims:
- n*(n+1)/2
- info:
:type: integer
:intent: output
:substitutions: {}
:fortran_help: " SUBROUTINE CPPTRI( UPLO, N, AP, INFO )\n\n\
* Purpose\n\
* =======\n\
*\n\
* CPPTRI computes the inverse of a complex Hermitian positive definite\n\
* matrix A using the Cholesky factorization A = U**H*U or A = L*L**H\n\
* computed by CPPTRF.\n\
*\n\n\
* Arguments\n\
* =========\n\
*\n\
* UPLO (input) CHARACTER*1\n\
* = 'U': Upper triangular factor is stored in AP;\n\
* = 'L': Lower triangular factor is stored in AP.\n\
*\n\
* N (input) INTEGER\n\
* The order of the matrix A. N >= 0.\n\
*\n\
* AP (input/output) COMPLEX array, dimension (N*(N+1)/2)\n\
* On entry, the triangular factor U or L from the Cholesky\n\
* factorization A = U**H*U or A = L*L**H, packed columnwise as\n\
* a linear array. The j-th column of U or L is stored in the\n\
* array AP as follows:\n\
* if UPLO = 'U', AP(i + (j-1)*j/2) = U(i,j) for 1<=i<=j;\n\
* if UPLO = 'L', AP(i + (j-1)*(2n-j)/2) = L(i,j) for j<=i<=n.\n\
*\n\
* On exit, the upper or lower triangle of the (Hermitian)\n\
* inverse of A, overwriting the input factor U or L.\n\
*\n\
* INFO (output) INTEGER\n\
* = 0: successful exit\n\
* < 0: if INFO = -i, the i-th argument had an illegal value\n\
* > 0: if INFO = i, the (i,i) element of the factor U or L is\n\
* zero, and the inverse could not be computed.\n\
*\n\n\
* =====================================================================\n\
*\n"
|
