Le 15/11/2016 à 08:53, Vincent Delecroix a écrit :
Not currently (though we have "Unknown"). The main problem is the
interaction with Python booleans and the operators "or", "and", "not"
(which are *not* logical operators). The Sage "Unknown" is badly
broken for these reasons
sage: not Unknown
> Johan's suggestion is very intriguing but, unless I am completely mistaken,
> it does not work in python. If I understand correctly if O is an instance of
> Foo and O does not have the attribute x then python looks for Foo().x
You're right, I seem to have confused myself with deleting attribut
On Tue, Nov 15, 2016 at 08:53:43AM +0100, Vincent Delecroix wrote:
> Not currently (though we have "Unknown"). The main problem is the
> interaction with Python booleans and the operators "or", "and", "not"
> (which are *not* logical operators). The Sage "Unknown" is badly
> broken for these reason
On 15 November 2016 at 09:12, Bruno Grenet wrote:
> Le 15/11/2016 à 08:53, Vincent Delecroix a écrit :
>>
>> Not currently (though we have "Unknown"). The main problem is the
>> interaction with Python booleans and the operators "or", "and", "not"
>> (which are *not* logical operators). The Sage "
On 15 November 2016 at 09:19, Thierry wrote:
> On Tue, Nov 15, 2016 at 08:53:43AM +0100, Vincent Delecroix wrote:
>> Not currently (though we have "Unknown"). The main problem is the
>> interaction with Python booleans and the operators "or", "and", "not"
>> (which are *not* logical operators). Th
On 15 November 2016 at 09:27, Vincent Delecroix
<20100.delecr...@gmail.com> wrote:
> On 15 November 2016 at 09:19, Thierry wrote:
>> On Tue, Nov 15, 2016 at 08:53:43AM +0100, Vincent Delecroix wrote:
>>> Not currently (though we have "Unknown"). The main problem is the
>>> interaction with Python
On Tue, Nov 15, 2016 at 09:27:14AM +0100, Vincent Delecroix wrote:
> On 15 November 2016 at 09:19, Thierry wrote:
> > On Tue, Nov 15, 2016 at 08:53:43AM +0100, Vincent Delecroix wrote:
> >> Not currently (though we have "Unknown"). The main problem is the
> >> interaction with Python booleans and
And what do you do with
my_function1() or my_function2() or my_function3()
shortcut or not shortcut? The current state of Python is that some of
the above functions might not be evaluated (ie shortcut) *before*
knowing the return type.
On 15 November 2016 at 09:41, Thierry wrote:
> On Tue, Nov
You are right this was a non-example...
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On Tue, Nov 15, 2016 at 09:43:18AM +0100, Vincent Delecroix wrote:
> And what do you do with
>
> my_function1() or my_function2() or my_function3()
Shortcut when you meet a True. For "and", shortcut when you meet a Unknown
or a False.
> shortcut or not shortcut? The current state of Python is t
Hi,
The current Hermite normal form algorithm in Sage for matrices over k[x]
seems embarrassingly slow. It is a generic algorithm for matrices over
PIDs. What would be possible ways to improve the situation? Any reference
to literature or implementations or like would be welcome. Thanks.
--
Y
There is still a semantic problem to solve the following
sage: Unknown or False
False
sage: False or Unknown
Unknown
Python is using __nonzero__ to deal with these or/and/not operators.
This method __nonzero__ implicitly defines the conversion to booleans.
And Python sets
x or y := x if bool(x)
On 2016-11-14 23:56, Paul Masson wrote:
I'm running into an problem that after building 7.5.beta1 or 7.5.beta2,
building a branch based on 7.4.beta5 fails
Well, it's a *beta* for a reason, failures can happen. In this case, the
problem is #21672 which is fixed in 7.4.rc2.
--
You received thi
Dear William,
Thanks for the quick reply. The problem Thomas experience in SMC was that
parts of his worksheet just disappeared and were not to be found in the
snapshots. He could recover them from the log files and painfully put them
in again, only to experience that bits started disappearing a
On Tuesday, November 15, 2016 at 1:34:00 AM UTC, Paul Masson wrote:
>
>
>
> On Monday, November 14, 2016 at 3:51:49 PM UTC-8, Dima Pasechnik wrote:
>>
>> Did you have a pressing need to build an old branch?
>> I'd normally first rebase over the latest beta, and then build.
>>
> What do you mean b
On Tuesday, November 15, 2016 at 7:07:06 AM UTC, Ralf Stephan wrote:
>
> On Tuesday, November 15, 2016 at 2:34:00 AM UTC+1, Paul Masson wrote:
>>
>> Or is the current recommendation to always merge develop after every new
>> beta?
>>
>
> I think it's to use it sparingly. That the history from g
This is amazing, I had no idea there was a way to run SMC locally already.
Interestingly, https://hub.docker.com/u/sagemath/ points to sagemath.org as
homepage, but I couldn't find a link to hub.docker.com at sagemath.org. I
think it would be great to point to this resource at least on the downl
Thanks, Volker. I just installed the VB image on my linux laptop and I can
access the jupyter notebook through my local firefox on
http://localhost:8000. So it seems to be a windows issue that Thomas can't.
Do you have an idea what dodgy windows programs could be the reason?
Antivirus? If you k
On Tuesday, November 15, 2016 at 9:52:02 AM UTC, Stan wrote:
>
> Thanks, Volker. I just installed the VB image on my linux laptop and I can
> access the jupyter notebook through my local firefox on
> http://localhost:8000. So it seems to be a windows issue that Thomas
> can't. Do you have an i
OK, I just asked Thomas to send me the email thread about his problem with
SMC. His communication was with William Stein and Harald Schilly, and
related to lost bits of a jupyter notebook that were not even recoverable
using the revert button or the backup utility, plus bits started
disappearin
Hi Vincent,
On 2016-11-15, Vincent Delecroix <20100.delecr...@gmail.com> wrote:
>>> Perhaps was the proposal too greedy, so i wonder whether there would be a
>>> possibility to have a trool adding an Unknown to bool that does not
>>> perturb the speed when only True and False are used, and so that
Hi Vincent,
sorry for my previous post, as you discussed the example already.
On 2016-11-15, Vincent Delecroix <20100.delecr...@gmail.com> wrote:
> There is still a semantic problem to solve the following
>
> sage: Unknown or False
> False
No. Unknown or False is Unknown.
The shortcuts would be
Hi Simon,
On 15 November 2016 at 11:44, Simon King wrote:
> Hi Vincent,
>
> [...]
>
>> Python is using __nonzero__ to deal with these or/and/not operators.
>> This method __nonzero__ implicitly defines the conversion to booleans.
>> And Python sets
>>
>> x or y := x if bool(x) is True and y other
Hi Vincent,
On 2016-11-15, Vincent Delecroix <20100.delecr...@gmail.com> wrote:
> Indeed, __or__ is for the operator |. "or" can not be overridden.
>
> sage: class a(object):
> : def __or__(self, other):
> : return "hello"
> sage: a() or True
><__main__.a object at 0x7f2549683b
You mean to start the VM (sage is started within the VM automatically), ssh
into it, shut down sage and restart with the options I want? Not sure how
to ssh into the VM, but I'll play again with the .xinitrc.
On Tuesday, November 15, 2016 at 11:11:39 AM UTC+1, Dima Pasechnik wrote:
>
>
>
> On T
On Tuesday, November 15, 2016 at 11:32:11 AM UTC, Stan wrote:
>
> You mean to start the VM (sage is started within the VM automatically),
> ssh into it, shut down sage and restart with the options I want? Not sure
> how to ssh into the VM,
>
Yes; even better, modify .xinitrc not to start Sage
I think this was actually a problem with autosave we had for about one
week. Of course we didn't know that at the time. I'm not sure why to
say, except the root problem is probably solved, and if not there is a
straightforward way to just use plain jupyter in SMC anyways.
On Tuesday, November 1
On Mon, Nov 14, 2016 at 10:48 PM, VulK wrote:
> Dear All,
> sorry for the late reply and thank you very much for the input.
>
>
>
> As far as having methods not always defined the consensus here is leaning
> towards making sublcasses but I am quite reluctant to do that because of
> future things I
On Mon, Nov 14, 2016 at 6:43 PM, William Stein wrote:
> On Mon, Nov 14, 2016 at 8:40 AM, Erik Bray wrote:
>> On Mon, Nov 14, 2016 at 4:49 PM, William Stein wrote:
>>> On Mon, Nov 14, 2016 at 6:21 AM, Stan wrote:
Dear all,
A student of mine has been using SMC because the sage appl
> Or is the current recommendation to always merge develop after every new
>>> beta?
>>>
>>
>> I think it's to use it sparingly. That the history from git log is
>> gobbled is IMO a git bug.
>>
>> perhaps we need a policy that for a positive review of a ticket branch
> things like merge commi
On Tuesday, November 15, 2016 at 2:29:30 PM UTC, Erik Bray wrote:
>
> On Mon, Nov 14, 2016 at 6:43 PM, William Stein > wrote:
> > On Mon, Nov 14, 2016 at 8:40 AM, Erik Bray > wrote:
> >> On Mon, Nov 14, 2016 at 4:49 PM, William Stein > wrote:
> >>> On Mon, Nov 14, 2016 at 6:21 AM, Stan >
>
On Tuesday, November 15, 2016, Dima Pasechnik wrote:
>
>
> On Tuesday, November 15, 2016 at 2:29:30 PM UTC, Erik Bray wrote:
>>
>> On Mon, Nov 14, 2016 at 6:43 PM, William Stein wrote:
>> > On Mon, Nov 14, 2016 at 8:40 AM, Erik Bray wrote:
>> >> On Mon, Nov 14, 2016 at 4:49 PM, William Stein
>
On Monday, November 14, 2016 at 10:49:56 PM UTC-8, Ralf Stephan wrote:
>
>
> so it seems the Python abs can be overridden.
>
Yes, abs is not a keyword. It's just a name that's by default bound to
__builtin__.abs . However, given that python's "abs" gives access to a
protocol that allows custom
Inspired by the ask.sagemath question
https://ask.sagemath.org/question/35587/why-sigman-seems-not-so-performant-for-small-n/,
I started looking at timings for the sigma function (sigma(n) = sum of the
divisors of n, sigma(n, k) = sum of the kth powers of the divisors of n).
On my computer, a
On Tue, Nov 15, 2016 at 11:47 AM, John H Palmieri
wrote:
> Inspired by the ask.sagemath question
> https://ask.sagemath.org/question/35587/why-sigman-seems-not-so-performant-for-small-n/,
> I started looking at timings for the sigma function (sigma(n) = sum of the
> divisors of n, sigma(n, k) = su
I guess that it would be much better to also propose access to
1) the flint function
void fmpz_divisor_sigma ( fmpz_t res , const fmpz_t n , ulong k )
2) the pari function sigma
For example, pari timing is competitive in this range
$ sage -c "timeit('L = [sigma(n) for n in range(10**13, 10
On Tue, 15 Nov 2016, John H Palmieri wrote:
Also, should we switch to a naive implementation of sigma: essentially just
return sum(divisors(n))?
The answer to questions like this is always the same, I guess:
Add string-valued parameter 'algorithm' with None as default. For None use
some kind
On Tuesday, November 15, 2016 at 5:10:40 PM UTC, William wrote:
>
>
>
> On Tuesday, November 15, 2016, Dima Pasechnik > wrote:
>
>>
>>
>> On Tuesday, November 15, 2016 at 2:29:30 PM UTC, Erik Bray wrote:
>>>
>>> On Mon, Nov 14, 2016 at 6:43 PM, William Stein
>>> wrote:
>>> > On Mon, Nov 14, 2
On Tue, Nov 15, 2016 at 1:18 PM, Dima Pasechnik wrote:
> as https://docs.docker.com/docker-for-windows/#download-docker-for-windows
> says:
> "Docker for Windows requires 64bit Windows 10 Pro, Enterprise and Education
> (1511 November update, Build 10586 or later) and Microsoft Hyper-V."
> So this
Hello,
I'm wondering whether there is a way to run the doctests of a single
function. Something like this:
def f():
r"""
sage: f()
42
"""
return 41
run_doctests(f)
(Note: there is a command called run_doctests, which runs all tests in a
file / module, which I find very usef
On Tuesday, November 15, 2016 at 9:35:23 PM UTC, William wrote:
>
> On Tue, Nov 15, 2016 at 1:18 PM, Dima Pasechnik > wrote:
> > as
> https://docs.docker.com/docker-for-windows/#download-docker-for-windows
> > says:
> > "Docker for Windows requires 64bit Windows 10 Pro, Enterprise and
> Edu
On Tue, Nov 15, 2016 at 2:35 PM, Dima Pasechnik wrote:
>
>
> On Tuesday, November 15, 2016 at 9:35:23 PM UTC, William wrote:
>>
>> On Tue, Nov 15, 2016 at 1:18 PM, Dima Pasechnik wrote:
>> > as
>> > https://docs.docker.com/docker-for-windows/#download-docker-for-windows
>> > says:
>> > "Docker fo
On 15 November 2016 at 21:44, Jori Mäntysalo wrote:
> On Tue, 15 Nov 2016, John H Palmieri wrote:
>
>> Also, should we switch to a naive implementation of sigma: essentially
>> just
>> return sum(divisors(n))?
>
>
> The answer to questions like this is always the same, I guess:
>
> Add string-valu
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