1elpa_invert_triangular(3)  Library Functions Manual  elpa_invert_triangular(3)
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NAME

6       elpa_invert_triangular - Invert an upper triangular matrix this routine
7       also exists with explicit names elpa_invert_triangular_double
8       elpa_invert_triangular_float elpa_invert_triangular_double_complex
9       elpa_invert_triangular_float_complex
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SYNOPSIS

13   FORTRAN INTERFACE
14       use elpa
15       class(elpa_t), pointer :: elpa
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17       call elpa%invert_triangular (a, error)
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19       With the definitions of the input and output variables: datatype ::
20       acanbedevicepointeroftype(c_ptr)
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22       datatype :: a
23              The matrix a which should be inverted. The dimensions of matrix
24              a must be set BEFORE with the methods elpa_set(3) and
25              elpa_setup(3). The datatype of the matrix can be one of
26              "real(kind=c_double)", "real(kind=c_float)",
27              "complex(kind=c_double)", or "complex(kind=c_float)"
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29       integer, optional :: error
30              The return error code of the function. Should be "ELPA_OK". The
31              error code can be querried with the function elpa_strerr(3)
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34   C INTERFACE
35       #include <elpa/elpa.h>
36       elpa_t handle;
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38       void elpa_invert_triangular(elpa_t handle, datatype *a, int *error);
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40       With the definitions of the input and output variables:
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43       elpa_t handle;
44              The handle to the ELPA object
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46       datatype *a;canbeadevicepointer
47              The matrix which should be inverted. The dimensions of the
48              matrix must be set BEFORE with the methods elpa_set(3) and
49              elpa_setup(3). The datatype can be one of "double", "float",
50              "double complex", or "float complex".  int *error; The error
51              code of the function. Should be "ELPA_OK". The error codes can
52              be querried with elpa_strerr(3)
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DESCRIPTION

56       Inverts an upper triangular real or complex matrix. The functions
57       elpa_init(3), elpa_allocate(3), elpa_set(3), and elpa_setup(3) must be
58       called BEFORE elpa_eigenvalues can be called.
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SEE ALSO

61       elpa2_print_kernels(1) elpa_init(3) elpa_allocate(3) elpa_set(3)
62       elpa_setup(3) elpa_strerr(3) elpa_eigenvalues(3) elpa_eigenvectors(3)
63       elpa_choleksy(3) elpa_solve_tridiagonal(3) elpa_hermitian_multiply(3)
64       elpa_uninit(3) elpa_deallocate(3)
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68ELPA                            Mon Nov 15 2021      elpa_invert_triangular(3)
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