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elpa_cholesky(3) Library Functions Manual elpa_cholesky(3) NAME elpa_cholesky - do a Cholesky factorization of a real symmetric or complex hermitian matrix SYNOPSIS FORTRAN INTERFACE use elpa class(elpa_t), pointer :: elpa call elpa%cholesky (a, error) With the definitions of the input and output variables: datatype :: a The matrix a which should be decomposed. 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_cholesky(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 decomposed. 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 Compute the Cholesky decomposition of a real symmtric or complex hermitian 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_invert_triangular(3) elpa_solve_tridiagonal(3) elpa_hermitian_multiply(3) elpa_uninit(3) elpa_deallocate(3) ELPA Sat Jul 15 2017 elpa_cholesky(3)
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO
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