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matrix_fft.py
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Created
Fri, Sep 27, 14:02
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text/x-python
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Sun, Sep 29, 14:02 (2 d)
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R6746 RationalROMPy
matrix_fft.py
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# Copyright (C) 2018 by the RROMPy authors
#
# This file is part of RROMPy.
#
# RROMPy is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# RROMPy is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with RROMPy. If not, see <http://www.gnu.org/licenses/>.
#
import
numpy
as
np
from
rrompy.hfengines.base
import
MatrixEngineBase
as
MEB
def
matrixFFT
():
N
=
100
solver
=
MEB
(
verbosity
=
0
)
np
.
random
.
seed
(
420
)
solver
.
setSolver
(
"SOLVE"
)
fftB
=
np
.
fft
.
fft
(
np
.
eye
(
N
))
*
N
**-.
5
solver
.
nAs
=
2
solver
.
As
=
[
fftB
.
dot
(
np
.
multiply
(
np
.
arange
(
1
,
1
+
N
),
fftB
.
conj
())
.
T
),
-
np
.
eye
(
N
)]
solver
.
nbs
=
1
solver
.
bs
=
[
np
.
random
.
randn
(
N
)
+
1.j
*
np
.
random
.
randn
(
N
)]
return
solver
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