On 11 September 2012 13:16, Volker Braun vbraun.n...@gmail.com wrote:
But I need the classical invariants / covariants with their conventional
names and normalizations in the literature. I'm not trying to do the most
general SL(n,C) representation theory here.
I agree (for my own
Dima, you have just insulted my favourite word (catalecticant)! They
play an important role in 2-descent on elliptic curves! I will be
happy when search_src(catalecticant) returns a result.
But don't worry, I will not be campaigning to have Sylvester's
preferred catalecticizant as an alias
On 29 May 2014 21:02, Nathann Cohen nathann.co...@gmail.com wrote:
BUT: this would result in code in Sage that is not useful purely
within Sage. And there are people, loud people, that say there should
not be such code in Sage.
I do not know what is code in Sage that is not useful purely
Successfully upgraded to 2.8.8.1 on linux (Kubuntu 7.04):
sage --testall
(...)
All tests passed!
Total time for all tests: 1978.6 seconds
John Cremona
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http://www.cems.uvm.edu/~voight/
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compiles all of its packages, but
lots of them can be turned off by inserted suitable tags in the
configure command line. You could try that to see which parts were
broken.
John Cremona
On 28/10/2007, Bill Hart [EMAIL PROTECTED] wrote:
I've been looking at LiDIA again to see how fast the number field
number than SAGE is via FLINT-
QS, i.e. about the same as Pari and a little slower than Magma.
Bill.
On 28 Oct, 17:38, John Cremona [EMAIL PROTECTED] wrote:
Bill's post reminded to me to report on a discussion I had about 10
days ago with Johannes Buchmann.
Buchmann's group created
: 29 Oct 2007 08:50
Subject: Re: LiDIA, GPL, and Sage
To: John Cremona [EMAIL PROTECTED]
Dear John,
On Mon, Oct 29, 2007 at 09:30:56AM +0100, Christoph Ludwig wrote:
On Sun, Oct 28, 2007 at 05:59:16PM +, John Cremona wrote:
At the same time, it would be really
helpful if LiDIA could
PROTECTED]
Date: 29 Oct 2007 08:30
Subject: Re: LiDIA, GPL, and Sage
To: John Cremona [EMAIL PROTECTED]
Dear John,
On Sun, Oct 28, 2007 at 05:59:16PM +, John Cremona wrote:
A few days ago I was talking to Johannes Buchmann about LiDIA. I told
him how useful it would be for LiDIA to be released
Watch this space for a very helpful response from Christoph Ludwig
which I will forward...
John
On 29/10/2007, mabshoff
[EMAIL PROTECTED] wrote:
On Oct 29, 2:22 am, Bill Hart [EMAIL PROTECTED] wrote:
On 28 Oct, 20:26, John Cremona [EMAIL PROTECTED] wrote:
OK, so I wasn't trying
On 29/10/2007, Martin Albrecht [EMAIL PROTECTED] wrote:
Hi,
On Monday 29 October 2007, John Cremona wrote:
Since you have a lot more things to add to your list, you should
delete the p-adic arithmetic item, since that already exists in pari.
(I am not saying taht the capabilities
ok, I'm off to read the Sage p-adic documentation before I risk making
more of a fool of myself!
John
On 29/10/2007, William Stein [EMAIL PROTECTED] wrote:
On 10/29/07, John Cremona [EMAIL PROTECTED] wrote:
On 29/10/2007, Martin Albrecht [EMAIL PROTECTED] wrote:
On Monday 29 October 2007
Wow -- staggering. I'm also rather impressed by how firefox renders
.py files in the repository!
John
On 29/10/2007, William Stein [EMAIL PROTECTED] wrote:
On 10/29/07, John Cremona [EMAIL PROTECTED] wrote:
ok, I'm off to read the Sage p-adic documentation before I risk making
more
--
From: Martin Albrecht [EMAIL PROTECTED]
Date: 30 Oct 2007 22:21
Subject: Re: Sage Days 6
To: John Cremona [EMAIL PROTECTED]
You were down to implement baby step giant step to compute E(F_q). I
did that quite recently for mwrank so you might find the C++ code
there helpful. Actually I did
to Sage!
By the way, although I sent the organisers of that conference a
corrected set of slides, the ones posted for my talk are the
uncorrected ones. In case anyone on this lsit is interested...
John
Bill.
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John Cremona
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To post
not
worth factoring (might be worth doing trial division for squares of
small primes though).
- Robert
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ok, I'm happy!
On 01/11/2007, William Stein [EMAIL PROTECTED] wrote:
On 11/1/07, John Cremona [EMAIL PROTECTED] wrote:
In my opinion construction of the field, in order to able to do basic
arithmetic in it, should not require any checking other than that the
defining polynomial
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URLs
algorithms for different sizes of
field, and so on.
I hope that is clearer now!
John
On 01/11/2007, Martin Albrecht [EMAIL PROTECTED] wrote:
On Tuesday 30 October 2007, John Cremona wrote:
I agree about not rewriting for the sake of it -- but this was on the
to-do list for SD5, wasn't
does, but I never finished it
(it is hardly publishable). And I should say up front that it is very
similar to what LiDIA does (but is more efficient in some significant
ways, and has fewer bugs!)
John
On 01/11/2007, John Cremona [EMAIL PROTECTED] wrote:
[This is still somehow attached to the off
by instinct.)
-- William
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. Anybody
agree/disagree?
--
Joel
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it's the same
as in Magma.
William
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Albrecht
_pgp: http://pgp.mit.edu:11371/pks/lookup?op=getsearch=0x8EF0DC99
_www: http://www.informatik.uni-bremen.de/~malb
_jab: [EMAIL PROTECTED]
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has very
*massively* improved during the last year, so this is now quite
reasonable.
-- william
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Thanks. After installing gfortran I found that the binary was called
gfortran-4.1 in /usr/bin so I linked that to /usr/bin/gfortran and now
the installation is proceeding ok.
John
On 05/11/2007, mabshoff
[EMAIL PROTECTED] wrote:
On Nov 5, 3:12 pm, John Cremona [EMAIL PROTECTED] wrote
we use and default
to LinBox if we have a fast BLAS (OSX, ATLAS, Goto).
Thoughts?
Martin
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with deeper knowledge of liblinboxwrap wants to dig into this feel
free to do so, there are plenty of other issues for me to play with.
william
Cheers,
Michael
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together
tonight, so I do not have time to investigate this now. If anybody
with deeper knowledge of liblinboxwrap wants to dig into this feel
free to do so, there are plenty of other issues for me to play with.
william
Cheers,
Michael
--
John Cremona
#. Since the script cleverly only does a long
computation when the result has not been stored, it keeps on using the
bad data (just an array subscript out of range). The solution is to
delete file E2.sobj .
I didn't think this was worth a trac ticket...
John
--
John Cremona
Thanks, and next time I'll make the trac myself (and after SD6 I may
even fix some things myself, you never know).
Anyway I had never seen the latex_embed stuff before -- it's nice!
John
On 06/11/2007, William Stein [EMAIL PROTECTED] wrote:
On 11/6/07, John Cremona [EMAIL PROTECTED] wrote
necessary?
Just curious,
Martin
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I thought this looked familiar! See my post at
http://pari.math.u-bordeaux.fr/archives/pari-users-0406/msg1.html
John
On 06/11/2007, John Cremona [EMAIL PROTECTED] wrote:
You are right of course -- one should always compute the order over
the smallest field of definition and then use
the hash values somehow work out
for the QQ case, but not the ZZ case.
Note that '==' and __hash__ have been hashed (pardon the pun) at some length
in the thread with this message:
http://groups.google.com/group/sage-devel/msg/b3812493e9d2d2c8
thanks
Joel
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John Cremona
things, but only got the information that sqrt is a
symbolic function. Could somebody tell me which algo is implemented or
better how to find the implemented algo.
Cheers, Steffen
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algorithm?
Steffen
On 9 Nov., 18:24, John Cremona [EMAIL PROTECTED] wrote:
Use the ?? operator to see the algorithm:
sage: a=GF(next_prime(10^6)).random_element()^2;
sage: a.sqrt??
Type: builtin_function_or_method
Base Class: type 'builtin_function_or_method
and Shanks might be a good solution
here. Any thoughts on other/better algorithm?
Steffen
On 9 Nov., 18:24, John Cremona [EMAIL PROTECTED] wrote:
Use the ?? operator to see the algorithm:
sage: a=GF(next_prime(10^6)).random_element()^2;
sage: a.sqrt??
Type
I see. In my example a was
sage: type(a)
type 'sage.rings.integer_mod.IntegerMod_int64'
John
On 09/11/2007, Robert Bradshaw [EMAIL PROTECTED] wrote:
On Nov 9, 2007, at 1:43 PM, John Cremona wrote:
[Hello Robert -- are you in Bristol yet?]
Just got in.
I'm puzzled now. My comment
thesis:
http://arxiv.org/pdf/math/0405133.
This might also be the easiest to implement.
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? Or that it's a
field? Because allowing bounded negative exponents is not enough to always
have inverses: x + y has no inverse if we require the exponents of x and y
to be bounded away from negative infinity.
David
--
John Cremona
--~--~-~--~~~---~--~~
To post
I didn't really mean don't implement them -- just don't do it
hastily and be sure you know what you are doing of you do! Of course,
everything should be implemented
John
On 16/11/2007, William Stein [EMAIL PROTECTED] wrote:
On Nov 16, 2007 2:07 AM, John Cremona [EMAIL PROTECTED] wrote
-- is that causing a problem? Should I
pick a different one? And a password?
Sorry if I am being stupid, this is new technology for me...
--
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it, and apply
it to new research problems, since this is a direct violation of the license
agreement.
-
I hope you will write a letter to the AMS though arguing your point of view.
-- William
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=getsearch=0x8EF0DC99
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the structure of the group, etc. No firm plans yet though I'm
meeting up with him next week to discuss this. It will be some time
before it's written and wrapped in sage.
david
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in the mutlitplicative constants).
Regards,
Ifti
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Something I have been meaning to raise for a while:
The code in the new cremona* package contains all of what was in the
mwrank* package. So the latter can be abandoned as soon as the
wrappings for mwrank functions have been migrated. This will only be
really serious when I next fix a bug
in lip.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[2]: *** [libntl.so] Error 1
make[1]: *** [lib] Error 2
Error building libntl.so
--
John Cremona
cause by mwrank. The issue seems to be the same issue as
Justin Walker reported in the 2.8.15 thread in sage-support.
Interestingly nobody ever reported it and I now finally have a
testcase that also produces the issue on sage.math under valgrind. I
have send John Cremona two valgrind
On 05/12/2007, William Stein [EMAIL PROTECTED] wrote:
On Dec 5, 2007 7:51 AM, John Cremona [EMAIL PROTECTED] wrote:
I'm sure that can be done, and in fact I have suggested it myself.
The cremona.spkg contains everything that mwrank.spkg did. So whoever
put mwrank into Sage
That would
to be instantiated. So it's a template function
problem.
John
On 05/12/2007, mabshoff
[EMAIL PROTECTED] wrote:
On Dec 5, 7:46 pm, John Cremona [EMAIL PROTECTED] wrote:
mwrank compiles with gcc 4.2, so that has never been a problem. I am
not sure who fixed it, but the changes should have certainly
in the origina mwrank packaging and wrapping (and did not
acquire the necessary knowho at SD6 either). But I am happy to answer
questions from anyone who is going to do it.
John
On 05/12/2007, mabshoff
[EMAIL PROTECTED] wrote:
On Dec 5, 10:17 am, John Cremona [EMAIL PROTECTED] wrote:
I can explain
for tolerating my rants -- must be having a bad day, and not
helped by valgrind
John
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For more options
from the mwrank/cremona
package which people might want to use independently? If so, you can
remove tmrank since that's just a test program from mwrank.
John
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PS I reopened trac 1403 to add a second patch since the original one
fixes mwrank only while the new one fixes the same termination
behaviour for the other executables in qcurves/*
John
On 06/12/2007, John Cremona [EMAIL PROTECTED] wrote:
Notes:
## cremona.spkg ##
Added copy
.
Thoughts?
Martin
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to a paper of my
student Steve Wesemeyer -- small world!]
John
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mathematician I had to rely on clicking around with Mercurial to get info like
that it would never happen, and I probably wouldn't trust what I see anyways.
I agree!
John
-- William
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the
computer itself
didn't crash so I just restarted the server.
With slashdot, you might have to put it in a looping restart script
like trac is :)
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:
http://trac.sagemath.org/sage_trac/ticket/1444
--
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Associate Professor of Mathematics
University of Washington
http://wstein.org
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.
Here's to getting even more stats into Sage than one already has with
import scipy.stats (which
is already pretty impressive)!
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
--
John Cremona
:
with no examples!
I'm not sure what went on beyond that.
--
Joel
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University of Washington
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Joel
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implementations I know of are in
SiMath (now defunct) and Magma, but it has been suggested as a good
project for a Masters student to reimplement it in Sage, and someone
might be doing that.
John Cremona
On 17/12/2007, William Stein [EMAIL PROTECTED] wrote:
- William
(Sent from my iPhone.)
Begin
,
it doesn't work out that way.
- Casey Stengel
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casued some earlier valgrind errors, and possibly
some other crashes, not on trac #1403.
John
On 18/12/2007, mabshoff
[EMAIL PROTECTED] wrote:
On Dec 18, 9:28 pm, Justin C. Walker [EMAIL PROTECTED] wrote:
On Dec 18, 2007, at 12:00 , John Cremona wrote:
On 18/12/2007, Justin C
= 0.054082399688
Saturating (bound = 100)...done:
points were already saturated.
Generator 1 is [0:-1:1]; height 0.054082399688
Regulator = 0.054082399688
The rank and full Mordell-Weil basis have been determined
unconditionally.
(20.1453 seconds)
Cheers,
Michael
--
John Cremona
[EMAIL PROTECTED] wrote:
On Dec 19, 12:37 pm, John Cremona [EMAIL PROTECTED] wrote:
Hi John,
I have changed the mwrank source code so that non-minimal models are
now handled properly. All the work is done on a minimal model, but
points are mapped back to the input model
a non-optional package!
John
On 20/12/2007, William Stein [EMAIL PROTECTED] wrote:
On Dec 20, 2007 9:55 AM, John Cremona [EMAIL PROTECTED] wrote:
eclib is ok (though I was tempted to make if jeclib ;))
If you make it eclib you increase the chances of getting
outside contributions a little
the isomorphism and give an incorrect
negative answer. So it's up to you to prove to me that this does not
happen (or change the code).
John
On 20/12/2007, Robert Bradshaw [EMAIL PROTECTED] wrote:
On Dec 20, 2007, at 3:21 AM, John Cremona wrote:
Topic 1: isomorphisms between Weierstrass models
, to improve the
way ATLAS builds.
4. At least by 2.9.2, we should have a pretty robust system for jmol.
I know there are one or two issues left, including #1580...
The plan is to do an rc0 by about 2:00am EST 12/22, then a release by
2am the next day.
-- Robert M
--
John Cremona
. Unfortunately
they did not document the details of how the code works.
Tim
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PS the thesis is (un)available here:
http://www.amazon.com/Integration-Algebraic-Functions-Lecture-Computer/dp/0387102906
On 23/12/2007, John Cremona [EMAIL PROTECTED] wrote:
It is possible that James Davenport, who spoke at Sage Days 6, might
wish to get in volced with a projtec to re
is the open source version
of the system (http://savannah.nongnu.org/projects/axiom).
The Axiom Tutorial book (ISBN 1-4116-6597-X) lists approximately
170 people who contributed to Axiom so far.
Tim
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To post
-- Forwarded message --
From: John Cremona [EMAIL PROTECTED]
Date: 26 Dec 2007 22:48
Subject: Re: cremona package under Sage
To: [EMAIL PROTECTED]
I cannot help with any of that since I did none of the Sage-mwrank
interface myself at all, and you have already found out more
and unit
group. This should change eventually, but right now...
David
On Dec 29, 2007 2:10 PM, Enrique Gonzalez-Jimenez
[EMAIL PROTECTED] wrote:
As John Cremona said at the sage.forum: But why would Sage be
computing the class group in order to factor 2 in K?
For me that is strange
of this
takes any time.
Then for each of the ideal factors, in hermite normal form, it has to
construct a SAGE ideal object. In the process of doing this, it checks
each one to see if it is principal. This appears to be what is taking
all the time.
Bill.
On 30 Dec, 10:27, John Cremona
of
the complete rewrite of the Sage-mwrank interface which WAS recently
mentioned as desirable.
The new package may be downloaded from
http://www.warwick.ac.uk/staff/J.E.Cremona/eclib-20071231.spkg
John
On 20/12/2007, William Stein [EMAIL PROTECTED] wrote:
On Dec 20, 2007 10:18 AM, John Cremona
within Sage --
that's enough work already!
John
On 31/12/2007, Ismail Dönmez [EMAIL PROTECTED] wrote:
Hi,
Monday 31 December 2007 18:19:15 tarihinde John Cremona şunları yazmıştı:
The new package may be downloaded from
http://www.warwick.ac.uk/staff/J.E.Cremona/eclib-20071231.spkg
Would
. This is the culmination of
over 30 years of hard work and careful polish.
== Maintainers ==
* William Stein
* John Cremona
* Ralph Philip Weinmann
* Michael Abshoff
== Upstream Contact ==
* Author: John Cremona
* Email: [EMAIL PROTECTED]
* Website: http://www.warwick.ac.uk/~masgaj
with
the code and also the design of mwrank. Since #1650 is still out there
we might have to postpone the merged of the new eclib.spkg
Cheers,
Michael
I am catching some sleep now - back in about 8 hours, finally getting
some more work done on 2.9.2.alpha0.
Cheers,
Michael
--
John
the explanations in
there...).
I know that today there's the big AMS meeting (good luck for that), so no
need to hurry in order to reply for anyone. And excuse my English, there
maybe some mistakes since I'm in a rush...
Thanks a lot, Fabio
--
John Cremona
] FFmpeg's libavcodec codec family
libavcodec is more or less the default codec of mencoder, which is the
encoding-brother of mplayer. so, this is pretty standard - i think
your download has a problem or your mplayer version is crippled (no
installed/activiated modules).
h
--
John Cremona
of gmp makes it
into sage
I am confident it will be resolved. The changes gmp 4.2.1-4.2.2 were
largely config fixes and fixes for exotic platforms, so I don't expect
any problems once we remerge our patch set.
Thanks for the report.
Cheers,
Michael
--
John Cremona
will be submitted on Thursday so please make comments asap.
-- William
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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John Cremona
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Elliptic curve isomorphism code only works when the characteristic is
not 2 or 3. I expect to submit a patch shortly. See note added to
trac #740.
John
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John Cremona
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of rings with involution
(from
which CC, quadratic rings, cyclotomic rings, and a class of CM
fields
would
inherit).
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David
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John Cremona
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Professor of Mathematics
University of Washington
http://wstein.org
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John Cremona
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for them.
John
On 14/01/2008, mabshoff
[EMAIL PROTECTED] wrote:
On Jan 14, 3:07 pm, William Stein [EMAIL PROTECTED] wrote:
On 1/14/08, John Cremona [EMAIL PROTECTED] wrote:
Hi,
sorry for being late to the party, but I had to catch up on sleep
first ;)
I think that as more people use
OK, so I was perhaps over-enthusiastic in my praise! But it is still
useful to have done this, so thanks.
John
On 14/01/2008, D. Benjamin Antieau [EMAIL PROTECTED] wrote:
On Jan 14, 2008 8:07 AM, William Stein [EMAIL PROTECTED] wrote:
On 1/14/08, John Cremona [EMAIL PROTECTED] wrote
is
that singular doesn't use much memory at all. I killed it after 10
minutes. Any ideas?
david
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] |
| http://bil.members.beeb.net |
+---+
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John Cremona
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[EMAIL PROTECTED] wrote:
Hi,
Let C be a plane conic given by an equation of the form
C:Ax^2+Bxy+Cy^2+Dx+Ey+F=0 where A,B,C,D,E,F in ZZ.
Is there a package or function in SAGE that compute C(ZZ)?
John Cremona -- is there code in your mwrank package that could do
this??
I have
cumbersome,
but one can always do E.parent()).
Do it like objgens():
E, (P, Q) = generic_points(2)
Nick
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sage: var('u,r,s,t')
(u, r, s, t)
sage: t/u^3 + (r*s - t)/u^3 - r*s/u^3
t/u^3 + (r*s - t)/u^3 - r*s/u^3
sage: (t/u^3 + (r*s - t)/u^3 - r*s/u^3).simplify()
t/u^3 + (r*s - t)/u^3 - r*s/u^3
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John Cremona
Thanks!
John
On 15/01/2008, Justin C. Walker [EMAIL PROTECTED] wrote:
On Jan 15, 2008, at 1:01 PM, John Cremona wrote:
Why does this symbolic expression not simplify (to 0)?
John
[EMAIL PROTECTED]
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the extension without changing the curve.
John
david
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computation results in this particular
simplification being needed? the names u,r,s,t give it away, at least
to the elliptic curve addicts!]
John
On 15/01/2008, William Stein [EMAIL PROTECTED] wrote:
On Jan 15, 2008 1:01 PM, John Cremona [EMAIL PROTECTED] wrote:
Why does this symbolic
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