elpa_eigenvalues_float_complex(3)

1elpa_eigenvalues_float_complLeixb(r3a)ry Functions Mealnpuaa_leigenvalues_float_complex(3)
2
3
4

NAME

6       elpa_eigenvalues_float_complex - computes the eigenvalues of a complex
7       single-precision hermitian matrix
8
9

SYNOPSIS

11   FORTRAN INTERFACE
12       use elpa
13       class(elpa_t), pointer :: elpa
14
15       call elpa%eigenvalues_float_complex (a, ev, error)
16
17       With the definitions of the input and output variables:
18
19       class(elpa_t) :: elpa  ! returns an instance of the ELPA object
20
21       datatype :: a
22              The matrix a for which the eigenvalues should be computed. The
23              dimensions of matrix a must be set BEFORE with the methods
24              elpa_set(3) and elpa_setup(3). The datatype of the matrix must
25              be complex(kind=c_float_complex). The matrix has to be hermitian
26              this is not checked by the routine. In case of a GPU build a can
27              be a device pointer of type "type(c_ptr) to a matrix a on the
28              device memory.
29
30       datatype :: ev
31              The vector ev where the eigenvalues will be stored in ascending
32              order. The datatype of the vector ev must be
33              "real(kind=c_float)". In case of a GPU build ev can be a device
34              pointer of type "type(c_ptr) to the vector of eigenvalues in the
35              device memory
36
37       integer, optional :: error
38              The return error code of the function. Should be "ELPA_OK". The
39              error code can be querried with the function elpa_strerr(3)
40
41
42   C INTERFACE
43       #include <elpa/elpa.h>
44       elpa_t handle;
45
46       void elpa_eigenvalues_float_compplex(elpa_t handle, datatype *a,
47       datatype *ev, int *error);
48
49       With the definitions of the input and output variables:
50
51
52       elpa_t handle;
53              The handle to the ELPA object
54
55       datatype *a;
56              The matrix a for which the eigenvalues should be computed. The
57              dimensions of the matrix must be set BEFORE with the methods
58              elpa_set(3) and elpa_setup(3). The datatype must be "float
59              complex". The matrix has to be symmetric, this is not checked by
60              the routine. In case of a GPU build a can be a device pointer to
61              a matrix a on the device memory.
62
63       datatype *ev;
64              The storage for the computed eigenvalues. Eigenvalues will be
65              stored in ascendig order. The datatype must be "float". In case
66              of a GPU build ev can be a device pointer to the vectors of
67              eigenvalues in the device memory.
68
69
70       int *error;
71              The error code of the function. Should be "ELPA_OK". The error
72              codes can be querried with elpa_strerr(3)
73
74

DESCRIPTION

76       Compute the eigenvalues of a single precision complex hermitian matrix.
77       The functions elpa_init(3), elpa_allocate(3), elpa_set(3), and
78       elpa_setup(3) must be called BEFORE elpa_eigenvalues can be called.
79

NAME

SYNOPSIS

DESCRIPTION

SEE ALSO