On Sep 11, 2:36 pm, Mike Hansen wrote:
> On Fri, Sep 10, 2010 at 10:17 PM, Dima Pasechnik wrote:
> > Does current_randstate().set_seed_gap() actually sets GAP's random
> > seed, so that
> > subsequent GAP commands make use of the correctly set seed?
>
> Yep.
I see. Well, I am told that my GAP
On Fri, Sep 10, 2010 at 10:17 PM, Dima Pasechnik wrote:
> Does current_randstate().set_seed_gap() actually sets GAP's random
> seed, so that
> subsequent GAP commands make use of the correctly set seed?
Yep.
--Mike
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Hi Simon,
On Sep 9, 10:23 pm, Simon King wrote:
> Hi Dima!
>
> On Sep 9, 2:44 pm, Dima Pasechnik wrote:
>
> >...
> > Nobody seems to be willing to review the ticket, however, as if the
> > problem got resolved in a way that escapes me.
>
> The problem for my package did indeed resolve, due to
>
Hi Dima!
On Sep 9, 2:44 pm, Dima Pasechnik wrote:
>...
> Nobody seems to be willing to review the ticket, however, as if the
> problem got resolved in a way that escapes me.
The problem for my package did indeed resolve, due to
current_randstate().set_seed_gap(). But of course it should better b
On Sep 9, 3:12 am, Peter Jeremy wrote:
> On 2010-Sep-06 21:29:35 +0100, "Dr. David Kirkby"
> wrote:
>
> >I would be very weary of any random number generator that claims to be a good
> >source of random numbers if the output differs by platform or compilation
> >mode.
>
> It depends what you
On 2010-Sep-06 21:29:35 +0100, "Dr. David Kirkby"
wrote:
>I would be very weary of any random number generator that claims to be a good
>source of random numbers if the output differs by platform or compilation
>mode.
It depends what you mean by "differs". For "real" random numbers, you
can
This is now trac ticket 9867.
Please review!
On Sep 7, 8:56 pm, Dima Pasechnik wrote:
> I've
> madehttp://boxen.math.washington.edu/home/dima/packages/gap-4.4.12.p5.spkg
> with the proper patches, bells, etc., and
> will make a ticket to update the things shortly.
>
> On Sep 7, 8:14 pm, Dima Pas
I've made
http://boxen.math.washington.edu/home/dima/packages/gap-4.4.12.p5.spkg
with the proper patches, bells, etc., and
will make a ticket to update the things shortly.
On Sep 7, 8:14 pm, Dima Pasechnik wrote:
> Hi Simon, hi all,
>
> I've made a small patch to GAP that fixes the problem.
> (in
Hi Simon, hi all,
I've made a small patch to GAP that fixes the problem.
(inspired by the corresponding Sage Python code :))
With this patch I get on Sparc:
sage: gap_console()
GAP4, Version: 4.4.12 of 17-Dec-2008, sparc-sun-solaris2.10-gcc
gap> Reset(GlobalMersenneTwister);; List([1..10],i->Rand
Hi Mike!
On 7 Sep., 10:42, Simon King wrote:
> ...
> That's VERY cool!
... modulo one critical comment: In principal (although it should
rarely occur in "real life") one can have several instances of an
interface. So, I think that current_randstate().set_seed_gap() should
accept an optional argu
Hi Mike!
On 7 Sep., 01:05, Mike Hansen wrote:
> On Mon, Sep 6, 2010 at 3:56 PM, Simon King wrote:
> > So indeed, it is not "Solaris vs. non-Solaris" but "little vs. big
> > endian", as the GAP people suspected.
>
> This is what I said in my first response and can be taken care of with
> current_
On Mon, Sep 6, 2010 at 9:31 PM, Dima Pasechnik wrote:
> I wonder how does GAP pick up the seed? (Don't even know where to look
> in the code...)
It is in sage/misc/randstate.pyx.
> On the other hand, how would one call
> current_randstate().set_seed_gap() from GAP?
You can't call it from GAP,
Indeed, this works on PPC, too:
sage: set_random_seed(100)
sage: current_randstate().set_seed_gap()
sage: gap.eval('List([1..10],i->Random(1,10));')
'[ 80761, 80557, 8462, 25730, 32000, 92371, 85402, 52347, 17181,
2889 ]'
sage: gap_console()
GAP4, Version: 4.4.12 of 17-Dec-2008, powerpc-apple-
On Mon, Sep 6, 2010 at 3:56 PM, Simon King wrote:
> So indeed, it is not "Solaris vs. non-Solaris" but "little vs. big
> endian", as the GAP people suspected.
This is what I said in my first response and can be taken care of with
current_randstate().set_seed_gap().
Core2:
sage: set_random_seed(
Hi Dave!
On 6 Sep., 23:53, "Dr. David Kirkby" wrote:
> ...
> > Reset(GlobalMersenneTwister);; List([1..10],i->Random(1,10));
>
> This is on a Sun Ultra 27 running OpenSolaris, with a Xeon box.
>
>...
> gap> Reset(GlobalMersenneTwister);; List([1..10],i->Random(1,10));
> [ 85758, 234,
On 09/ 6/10 10:42 PM, Simon King wrote:
Hi Dave!
On 6 Sep., 22:29, "Dr. David Kirkby" wrote:
Is the endianness really different on sage.math and t2.math?
Yes. x86 are little endian. SPARC is big endian.
Cool! Now I am really proud that my code mostly works on t2.
I can try the code if yo
Hi Dave!
On 6 Sep., 22:29, "Dr. David Kirkby" wrote:
> > Is the endianness really different on sage.math and t2.math?
>
> Yes. x86 are little endian. SPARC is big endian.
Cool! Now I am really proud that my code mostly works on t2.
> I can try the code if you want on my OpenSolaris system. That
On 09/ 6/10 09:17 PM, Simon King wrote:
Hi Dima!
On 6 Sep., 19:47, Dima Pasechnik wrote:
On the GAP support list we reached the conclusion that it is due to
endianness.
Is the endianness really different on sage.math and t2.math?
Yes. x86 are little endian. SPARC is big endian.
I can try
Hi Dima!
On 6 Sep., 19:47, Dima Pasechnik wrote:
> On the GAP support list we reached the conclusion that it is due to
> endianness.
Is the endianness really different on sage.math and t2.math?
This is actually a little ironic: At Sage Days XX in San Diego, a
couple of years ago, both Martin Al
Hi Nils!
On 6 Sep., 19:44, Nils Bruin wrote:
> If your tests depend on the choice of random numbers in a non-
> deterministic algorithm, they are going to be very fragile.
Sure. But the funtionality "determine a Sylow subgroup", "find an
isomorphism between two finite groups" etc. is essential t
On the GAP support list we reached the conclusion that it is due to
endianness.
(I can reproduce this behaviour on a MacOSX PPC machine)
It can also be noted that apparently GAP uses an old Mersenne Twister
code, whereas it
is known to be buggy in exactly this way (endianness!), and fixes
exist...
On Sep 6, 4:55 am, Simon King wrote:
> It seems that due to this problem, my package may compute a different
> (though isomorphic) ring presentation for a cohomology ring on
> different machines.
>
> But in some tests, I create elements with certain properties, and for
> that purpose I need a comp
Hi!
On Sep 6, 12:55 pm, Simon King wrote:
> ...
> What do you think is the best way to cope with that problem? Is there
> a painless way to duplicate some doctests and tell the test script
> that one version is for Solaris and the other is for everything else?
I just wonder if spkg-install could
PS:
On Sep 6, 1:21 pm, Simon King wrote:
> > ...
> > Do you need to use Random numbers? Can't you just pick a set of integers -
> > either those from t2, sage.math, or the lottery numbers, and use them
> > instead?
>
> I don't need these specific numbers. The example was just a concise
> way to
Hi Dave,
On Sep 6, 1:02 pm, "Dr. David Kirkby" wrote:
> ...
> Do you need to use Random numbers? Can't you just pick a set of integers -
> either those from t2, sage.math, or the lottery numbers, and use them instead?
I don't need these specific numbers. The example was just a concise
way to sho
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