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| elpa_invert_triangular(3) | FreeBSD Library Functions Manual | elpa_invert_triangular(3) |
NAME
elpa_invert_triangular - Invert an upper triangular matrix
SYNOPSIS
FORTRAN INTERFACE
use elpa
class(elpa_t), pointer :: elpa
call elpa%invert_triangular (a, error)
With the definitions of the input and output variables:
- datatype :: a
- The matrix a which should be inverted. The dimensions of matrix a must be set BEFORE with the methods elpa_set(3) and elpa_setup(3). The datatype of the matrix can be one of "real(kind=c_double)", "real(kind=c_float)", "complex(kind=c_double)", or "complex(kind=c_float)"
- integer, optional :: error
- The return error code of the function. Should be "ELPA_OK". The error code can be querried with the function elpa_strerr(3)
C INTERFACE
#include <elpa/elpa.h>
elpa_t handle;
void elpa_invert_triangular(elpa_t handle,
datatype *a, int *error);
With the definitions of the input and output variables:
- elpa_t handle;
- The handle to the ELPA object
- datatype *a;
- The matrix which should be inverted. The dimensions of the matrix must be set BEFORE with the methods elpa_set(3) and elpa_setup(3). The datatype can be one of "double", "float", "double complex", or "float complex". int *error; The error code of the function. Should be "ELPA_OK". The error codes can be querried with elpa_strerr(3)
DESCRIPTION
Inverts an upper triangular real or complex matrix. The functions elpa_init(3), elpa_allocate(3), elpa_set(3), and elpa_setup(3) must be called BEFORE elpa_eigenvalues can be called.
SEE ALSO
elpa2_print_kernels(1) elpa_init(3) elpa_allocate(3) elpa_set(3) elpa_setup(3) elpa_strerr(3) elpa_eigenvalues(3) elpa_eigenvectors(3) elpa_choleksy(3) elpa_solve_tridiagonal(3) elpa_hermitian_multiply(3) elpa_uninit(3) elpa_deallocate(3)
| Sat Jul 15 2017 | ELPA |
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