On Friday, October 19, 2018 at 10:16:28 AM UTC+9, William wrote:
>
>
> > (4) is this "range" the vanilla python built-in?
>
> Yes. Type "range??" in Sage to see.
>
Right. I didn't know that range first converts the argument to int, which
is why "range(Integer(10))" works.
By the way, I am h
Xavier,
For code for piecewise linear functions of several variables, see
here:
https://github.com/mkoeppe/cutgeneratingfunctionology/blob/master/piecewise_functions.sage
I'd be quite interested in getting something like this into sage. There's
no ticket for this yet.
Also, you might be intere
On Thu, Oct 18, 2018 at 5:58 PM Kwankyu Lee wrote:
> (2) interval should be redefined to give a list of Integers. Do you agree?
I wouldn't change it, because that code that depends on how it works
will break. And having a 1-year deprecation policy for this would be
very ugly. Also, it doesn't s
Thanks for your inputs. Let me summarize:
ellipsis notation: gives a list of Integers
sage: [0..9]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
sage: preparse('[0..9]')
'(ellipsis_range(Integer(0),Ellipsis,Integer(9)))'
sage: type([0..9].pop())
ZZ.range: gives a list of integers
sage: ZZ.range(10)
[0, 1, 2
Hello,
For some application I have in mind (related to ticket #26471 for
those who are interested), I need to have support for piecewise
affine functions in Sage. More precisely, what I mostly need is:
. to add, compose, take the sup/inf of these functions
. to check continuity, convexity, bijec
On Thursday, October 18, 2018 at 11:55:14 AM UTC-7, Simon Brandhorst wrote:
> I would say because there is no canonically defined embedding as one can
> send i to -i as well.
>
> That's in principle true, but in sage names of generators carry essential
information. For instance:
sage: parent(QQ
I would say because there is no canonically defined embedding as one can
send i to -i as well.
On Thursday, October 18, 2018 at 1:38:24 PM UTC+2, Daniel Krenn wrote:
>
> sage: CyclotomicField(3).extension(x^2+1, 'i')(QQ.extension(x^2+1,
> 'i').gen())
>
> returns
>
> TypeError: Cannot coerce el
IMHO the concept of type is mathematical enough to be mentioned early on,
otherwise they'll continue to be confused by the difference between floats,
ints, rationals, etc etc.
So this is a very instructive for students kind of error you have hit.
On Thu, 18 Oct 2018, 13:10 Kwankyu Lee, wrote:
>
Le jeudi 18 octobre 2018 14:13:33 UTC+2, Simon King a écrit :
>
>
> Such as srange(i,j)?
>
>
Btw, I've just noticed that in Python3-built Sage 8.4.rc1, srange returns a
list. Shouldn't it return an iterator instead?
Eric.
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Hi,
An alternative to Simon's answer is
sage: [i.is_prime() for i in [1..9]]
[False, True, True, False, True, False, True, False, False]
Best wishes,
Eric.
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Hi Kwankyu,
On 2018-10-18, Kwankyu Lee wrote:
> I am teaching sage to a class of first year math students. Today I was
> embarrassed when I tried
>
> [i.is_prime() for i in range(1,10)]
>
> because this raises an error. Until this point, I deliberately did not
> mention that there are in fact
Hi,
I am teaching sage to a class of first year math students. Today I was
embarrassed when I tried
[i.is_prime() for i in range(1,10)]
because this raises an error. Until this point, I deliberately did not
mention that there are in fact two kinds of "integers" in sage and avoided
to explain
sage: CyclotomicField(3).extension(x^2+1, 'i')(QQ.extension(x^2+1,
'i').gen())
returns
TypeError: Cannot coerce element into this number field
Does anyone have some idea why this is not working?
(This is https://trac.sagemath.org/ticket/26443)
Best, Daniel
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