ed?
The error code is GSL_ENOPROG - you can find the files where it is
used in the multimin/ directory.
Roughly speaking the error code is returned if the algorithm can't
find a downhill step - maybe that occurs if the gradient is not
accurate enough.
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> functions?
You'd have to make a series of calls to the siman function with
decreasing t_min and increasing alpha, rather than changing alpha on
each individual step.
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wondering if
> Octave has an C++ API for matrix operations that would be an alternative to
> the above two wrappers?
It does - that is probably a better choice for your application.
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to use those.
For information about linking with libraries see
http://www.network-theory.co.uk/docs/gccintro/
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differences representation?
No, but I would accept some functions for this.
> Is perhaps Jenkins-Traub ethod of finding all zeros of polynomial (RPOLY)
> considered for inclusion in GSL? Is poly/gsl_poly_orth.c?
These require some more feedback and testing from users to get
incorporated.
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ion.
Linear regression only works if the model is written with a dependent
variable, i.e. z = a*x + b*y + c, or similar. This minimises the
residual in the chosen direction -- if that's acceptable then you can
use linear regression.
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from users for
> poly/gsl_poly_orth.c? I think I can write texinfo documentation
> for it, but I don't know what is required of testing and feedback.
The existing test programs in the source show the sort of thing that
is needed.
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ied system a*(x-x0)+b*(y-y0)+c*(z-z0)=0 using SVD?
Golub and Van Loan's "Matrix Computations" has a section on using the
SVD to compute orthogonal regressions -- I think that should give you
the information you need.
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include other types (long double, char, etc) for
manipulating external data.
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with the newer
> (gsl_odeiv_evolve_apply exits with an error). Has this been purposely
> changed?
No, it should be 100% compatible. Please send a bug report to
[EMAIL PROTECTED] with an example if you still have the problem. Thanks.
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At Tue, 27 Nov 2007 17:50:53 +,
Daniel J Farrell wrote:
>memcpy(spectra->x->block->data,x,count * sizeof(double));
>memcpy(spectra->y->block->data,y,count * sizeof(double));
One minor point: x->data is equivalent to x->block->data
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t in the same way?
If you increase the gsl error tolerance by a factor of 10 do the
solutions deviate significantly?
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a float version of it (i.e. one that accepts
> gsl_matrix_float * ... )
>
> I'd prefer to keep using float in my program, because I need maximum
> performance (even at cost of less precision)... Is there a
> workaround?
>
Sorry, we only provide double pre
le program to
[EMAIL PROTECTED], with details of the compiler options you use and the
output of "cat /proc/cpuinfo" as well. Thanks.
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k with different generators. This is why it is a bit
slower. The 4x speedup comes from hardcoding a specific 32 bit
generator into the routine.
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At Tue, 11 Dec 2007 15:05:19 +,
Simon Manning wrote:
> Thank you for the clarification. In that case, do you know what relative
> performance I should expect in the release version of GSL?
Sorry I don't have any numbers for specific platforms.
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h small vectors one is usually working with a fixed rather than
variable length, which is another distinction from the usual BLAS
routines.
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ror handling though, so
it's not something I'd recommend as a solution in this case.
For some functions such as gsl_vector_get there's no convenient way to
return the out-of-bound information so we just return 0.
Using v->size is the right way to get the size.
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contact the developers and ask them to add "or any later version" to
their copyright notice.
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ar, can't seem to
> > find a system specific reason for this.
I heard back that the explanation in
http://lists.gnu.org/archive/html/bug-gsl/2007-07/msg1.html
solved the problem.
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At Tue, 3 Jul 2007 17:48:47 -0400 (EDT),
Brian Powell wrote:
>
> Brian,
>
ound background in ODEs could mentor this as a
> Google summer of code project?
If somebody wanted to implement some of the algorithms in the GSL
framework that would be cool.
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At Fri, 4 Jan 2008 15:43:32 +0100,
Jochen Küpper wrote:
> checking for GSL - version >= 1.10.1...
> *** 'gsl-config --version' returned 1.10.0, but the minimum version
> *** of GSL required is 1.10.1. If gsl-config is correct, then it is
> *** best to upgrade to the required version.
> *** If gsl-c
ct always returns, so the next if-else
> construct is never executed. Is this intentional?
Nope, something has got messed up there. Thanks for pointing that
out. It is supposed to match the ALGOL algorithm in Brent's book.
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At Sat, 5 Jan 2008 11:31:40 -0500,
Andrew W. Steiner wrote:
>
> I briefly took a look at this. The GSL cubic routine is failing
> because 'R' and 'Q'
> are not precisely zero. If the CR2==CQ3 test succeeded, the routine might
> also give the correct answer, except that Q is actually negative in th
At Mon, 7 Jan 2008 00:14:52 +0100,
Jochen Küpper wrote:
>
> The current values can be found in the article
>CODATA Recommended Values of the Fundamental Physical Constants: 2006
> on the arXiv:
>http://arxiv.org/abs/0801.0028
> and at
>physics.nist.gov/constants
> Maybe one could even
> remove the file\n");
> - printf("*** config.cache before re-running configure\n");
> - exit(1);
Don't we need to keep the exit(1)?
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At Tue, 8 Jan 2008 22:45:58 +0100,
Jochen Küpper wrote:
>
> On 08.01.2008, at 19:39, Brian Gough wrote:
> >
> > Don't we need to keep the exit(1)?
>
> Don't ask me why, but it is not necessary on my system (Mac OS X
> 10.5 / gcc-4.0)!!!
> Anyhow, we s
ct always returns, so the next if-else
> construct is never executed. Is this intentional?
>
This is now fixed in CVS, thanks for the bug report!
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--- a/min/brent.c
+++ b/min/brent.c
@@ -185,13 +185,11 @@ brent_iterate (void *vstate, gsl_function * f, dou
ror to see what is going on.
Maybe the tolerance is too strict, for example.
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At Thu, 17 Jan 2008 09:45:03 -0800,
Totte Karlsson wrote:
> I'm trying to find the examples that the gsl documentation refers to. There
> should be an examples dir somewhere but it is not in the distribution I
> have.
It is docs/examples.
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t; end of the calculation to contain the solution vector. However, the
> value had not been updated. The solution vector was in the internal s->x
> vector instead.
Thanks for the suggestion. I've added a few extra notes.
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runing the program under "valgrind" (www.valgrind.org)
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tolerance.
Please could you submit a bug report to [EMAIL PROTECTED] with a small
example program and output showing the first 5 steps from both. Thanks.
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At Sun, 27 Jan 2008 12:26:56 +,
Daniel J Farrell wrote:
>
> Maybe one of the developers here could describe what the interface
> would look like and others could supply the implementation?
>
> My guess would be,
>
> new file... gsl_interp2d.h
>
> gsl_interp2d * gsl_interp2d_alloc(const gs
the next
release the goal is to fix all the bugs reported since 1.10
https://savannah.gnu.org/bugs/?group=gsl
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At Thu, 24 Jan 2008 14:33:44 +,
Jonny Taylor wrote:
> I have a copy of Golub & van Loan (2nd edition) here, and as far as I
> can see it only talks about real QR decomposition. Did you have a
> part in mind where it talks specifically about complex decomposition?
As far as I remember it
At Mon, 28 Jan 2008 19:16:11 -0500,
Michael Stauffer wrote:
> I got an email from Warren Weckesser off-list that suggested the "...rk4"
> stepper algorithm I've been using is mainly of academic interest, and I
> should try the "...rkf45" or "...pd8" stepper for better results.
I agree with that.
l?
Maybe rounding. Try using gsl_ieee_env_setup and
GSL_IEEE_MODE=double-precision,mask-all.
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this pretty crucial point.
Thanks. I'll put that in the manual.
Would you be able to write some tests (similar to the existing ones in
linalg/test.c) so your complex QR can be included?
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At Tue, 29 Jan 2008 11:46:17 +,
Jonny Taylor wrote:
> With that taken into account, I've got it working. Source file is
> attached in case it is of use to anybody. I have not included
> equivalents of some of the functions in qr.c because I did not test
> them since I don't need them. I h
At Fri, 22 Feb 2008 14:47:01 +0100,
=?ISO-8859-1?Q?David_Lindel=F6f?= wrote:
> Are there any references I could consult about the relative merits of
> GSL in terms of speed and precision compared with the standard C
> routine? I'd like to document all this before I release this snapshot.
gsl/specf
L in a "desk
> calculator"
> style which requires minimal knowledge of Lisp:
>
Thanks for the info - I've added a link to
http://common-lisp.net/project/gsll/ on
the GSL webpage.
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operations would still make sense for complex numbers. What is really
> odd is, the same operations are defined for complex matrices.
Hmm, yes, that seems to be an oversight. I'll log it as a bug to be
fixed for the next release.
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GSL?
I'm really busy right now but I will give you some help after I have made the
1.11 release.
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At Wed, 12 Mar 2008 10:05:53 +,
Daniel J Farrell wrote:
> When is 1.11 schedule for release?
It's difficult to say, hopefully in the next couple of weeks.
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ould keep the old one for
compatibility.
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would like to
> incrementally update the model with the most recent reading. Is this
> possible with GSL?
Currently there is nothing specifically in GSL for that (it was
mentioned in the statistics TODO file but hasn't been implemented).
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new features can be used.
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outine for that, sorry.
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cases that could be changed.
It is mainly a question of how C99 could benefit users. The main
areas would be
- native complex numbers
- restricted pointers for optimisation
- new IEEE floating point functions/exception handling
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Hel
sent my problem.
Do you provide working 'copyfunc' and 'copy_constructor' functions?
If not, you will see this type of incorrect behavior I think.
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of that and
(ii) the behavior inside the region depends on the interpolation
method used.
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ah people have looked into
it but were not able to solve the spam problem involved in hosting
thousands of project wikis.
If anyone has any good examples I can include them in the source
distribution, either in the manual or in a separate examples book.
-
ol's aclocal files in ./autogen.sh, e.g.
aclocal -I /opt/libtool-2.2/share/aclocal
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would be really grateful of
> any suggestions as to how to fix this.
I don't know why that error occurs but you can turn off all the IEEE
functions by editing config.h and commenting out the #define
HAVE_AIX_IEEE_INTERFACE line. That should at least allow you to
compile the li
I don't know what this equation is called. It is used in the
> plane sheet solution of the heat/diffusion equation with type II (Neumann)
> boundary condition.
Sorry, there is no specific function for that.
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ly the interpolation is
failing to move away from the point "a".
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line that you are using.
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ck will have the correct size.
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SL itself. Take a look at OOL listed at
http://www.gnu.org/software/gsl/
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At Sat, 7 Jun 2008 20:56:03 +0200,
Marco Maggi wrote:
> We do not use 16 bits "int" anymore, so are we not there yet
> for "long double"?
The size of long double is not standardised, so you would get
different results on different architectures. Double precision is
alw
At Mon, 9 Jun 2008 12:36:07 -0600,
Patrick Alken wrote:
>
> I believe you can safely ignore these errors. The comparison is
> on line 510 of eigen/test.c:
>
> gsl_test_abs (gsl_complex_abs(vivj), 0.0, N * GSL_DBL_EPSILON,
> "%s, orthogonal(%d,%d), %s", desc, i, j, desc2);
>
> whic
for it
in the main distribution. But if you want to distribute a patch
yourself I guess that's not a problem.
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iate usage is
mean[i]=gsl_stats_mean(column.vector.data,column.vector.stride,m);
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point me towards the compiler options I need to make this
> work?
The GNU linker has a --wrap SYMBOL option which can be used to
substitute other functions for calls to malloc/free etc.
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_
ly simple thing to ask, but I can't come up with a
> simple way of achieving it...
It may be possible to modify gsl_sf_bessel_Jn_array to use a scale
factor in the recurrence to avoid underflow.
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_
At Tue, 15 Jul 2008 19:06:33 +0100,
Brian Gough wrote:
>
> At Tue, 08 Jul 2008 15:31:59 -0800,
> Britton Kerin wrote:
> > I think some time back someone told me a way to build the GSL that
> > would cause malloc to be replaced with GC_malloc etc. collector
> > calls
lts in GSL itself at the moment. I would recommend
that you make an estimate of n_max using the asymptotic formula for Jn.
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in working order? Is there any
> documentation for them? Should it be included with the rest of the
> GSL documentation?
Hello,
Functions not documented in the manual are considered obsolete or
unsupported. In particular gsl_linalg_exponential_ss is lacking any
tests, so it is not
lt?
Yes, or work in double precision.
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;s not something an individual
maintainer can change.
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their discussion mailing list may be a
suitable place to ask.
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At Mon, 1 Sep 2008 12:14:18 -0400,
David Doria wrote:
> Does any one have any idea why it would quit so early?
I would check that the gradient is correct (and has the correct
sign/direction). Otherwise, please send a sample program to
[EMAIL PROTECTED] - thanks.
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not find it)?
The rosenbrock functions are part of the test suite ("make check").
You can find them in the original source tarball.
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Help-
rnally so the momentum was lost.
Thanks for the table -- I've added your mail to the bug at
https://savannah.gnu.org/bugs/?22478 -- patches are welcome.
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at range. I guess the function needs to be reasonably
slowly varying over each region.
If you think this could be handled better could you submit a bug
report with a small example program showing the problem to
[EMAIL PROTECTED], thanks.
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output compared
with MATLAB. Thanks.
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At Mon, 15 Sep 2008 15:44:57 +0200,
Frank Reininghaus wrote:
> > make[2]: Entering directory `/home/liam/mathematics/gsl-1.11/poly'
> > FAIL: y.real, gsl_complex_poly_complex_eval ({-2.31 + 0.44i, 4.21 -
> > 3.19i, 0.93 + 1.04i, -0.42 + 0.68i}, 0.49 + 0.95i)
> > (-1.684507880004 observed vs 1.8
Certainly, it is a problem since for small omega I don't know
> how to perform the integral (QAGI integration refuses to handle
> oscillating integrals even for small frequencies).
In what way does it refuse? e.g. what is the error code returned?
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logs -- did you receive the mail from Mailman asking you to click on
the confirmation link?
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At Thu, 18 Sep 2008 20:09:52 +0100,
Brian Gough wrote:
> I can't find any record of your subscription request in the bug-gsl
> logs -- did you receive the mail from Mailman asking you to click on
> the confirmation link?
Ignore that -- you were successfully subscribed as [EMAI
; right?
If you put basis vectors like (0,0,1,0,0,0,0,0) into the coefficients
at that level of you can transform back to see the input weightings,
which will depend on the type of wavelet.
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__
ng should work, I can cross
compile for ARM without problems for example.
Can you send the full output from the configure script and config.log
to [EMAIL PROTECTED] so we can see why it is failing in your
case. Thanks.
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hy the
problem only shows up for i686. I will fix that.
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Today is the 25th anniversary of the start of the GNU Project [1].
We have made a lot of progress since then! If you'd like to support
the work of the GNU Project you can join the FSF as Associate member
at http://www.fsf.org/register_form?referrer=37
Thank you.
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ce of RNG
> and/or seeds in the case of parallel streams?
I would recommend using ranlxd. The seeds should give 2^31
effectively independent streams of length 10^171. A discussion of the
seeding procedure can be found in the file notes.ps at
http://www.briangough.ukfsn.org/ranlux_2.2/
At Thu, 2 Oct 2008 22:45:43 -0400,
Liam Healy wrote:
>
> I'd like to try the new version, but I'm having trouble building from git.
>
> git clone git://git.savannah.gnu.org/gsl.git
> ./autogen.sh
> configure.ac:7: required file `config.h.in' not found
Looks like it needs a call to autohead
> and Lenny):
> Amazingly, it seems that this feature is not well tested.
Can you compare the result with the system isinf() function. Thanks.
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hanks for the email. I have logged that as a bug -- negative chisq
should certainly not be returned, wherever it is coming from.
https://savannah.gnu.org/bugs/index.php?24510
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ways test the sign and put a note in the
documentation.
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At Fri, 10 Oct 2008 12:05:21 -0500,
Heigl, Werner wrote:
>
> Dear users, I'm in need of computing Bessel functions with a complex
> argument. Does GSL have that capability?
Sorry it does not, only real arguments.
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hich
the package runs).
> Question 2.
> What are these .lo and .la files created by the Makefiles?
These are libtool files. The actual .a files can be found in the .libs
subdirectories.
> Question 3.
> What does "libtool" do?
It is a wrapper around the compiler to compile
the CC, LD,
etc settings.
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f the function calls, so
you should not depend on that.
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Brian Gough
GNU Scientific Library -
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hen
> wondering what I should do with the copyrights for these modifications.
You should add your own copyright notice at the top of the file,
leaving the existing ones unchanged.
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Brian Gough
GNU Scientific Library -
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_
some parts of GSL. I did not follow it myself but they
published a paper on it. I don't have the reference to hand but it
should come up on a search for "gsl parallel" or similar terms.
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Brian Gough
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; and method to use in terms of speed, stability, and accuracy. Can you
> please help???
Hello,
For a general matrix try gsl_linalg_SV_decomp_mod which is designed
for the case of M>>N. The reference for it can be found in the GSL
manual.
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Brian Gough
(GSL Maintainer)
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w must be modified?
Hello,
Where possible, make a change of variables (analytically) so that the
limits of the new coordinates are independent.
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Brian Gough
(GSL Maintainer)
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