On Saturday, 14 December 2024 at 09:28:37 UTC-8 skchandh...@gmail.com wrote:
I want to compute a single place of degree 8 so I can use it as described
in the OP.
If you want to evaluate a function at a place, you'll just get a value in
the residue field. In the case of a degree 8 place, tha
On Friday, 13 December 2024 at 17:48:38 UTC-8 Kwankyu wrote:
On Sat, Dec 14, 2024 at 9:09 AM Sai Chandhrasekhar
wrote:
When I ran it, it took a little over an hour. Is there a way to speed up
this calculation?
No.
Well ... it depends on what you want to know. The curve you are describin
On Tuesday, 10 December 2024 at 18:29:14 UTC-8 skchandh...@gmail.com wrote:
I am trying to calculate a place of the degree 8 extension field of a
rational function field over GF(2^16) in SageMath. However, when I do this,
it is taking a very long time and doesn't produce a result even after hour
Investigating the error shows that sympy didn't do anything with this sum:
671 try:
--> 672 return result._sage_()
673 except AttributeError:
674 raise AttributeError("Unable to convert SymPy result
(={}) into"
ipdb> p result
Sum(log(1 - 1/2**
pecial case and intercept this.
On Thursday 3 October 2024 at 09:07:29 UTC-7 Nils Bruin wrote:
> The function in question is sort-of available as
> sage.functions.other.symbolic_limit (which is an inert form, so it requires
> a further "simplify").
>
> On Thursday
The function in question is sort-of available as
sage.functions.other.symbolic_limit (which is an inert form, so it requires
a further "simplify").
On Thursday 3 October 2024 at 08:29:50 UTC-7 Nils Bruin wrote:
> On Thursday 3 October 2024 at 04:44:12 UTC-7 Emmanuel Charpentier wr
On Thursday 3 October 2024 at 04:44:12 UTC-7 Emmanuel Charpentier wrote:
sage: F.limit(X[0]=3) Cell In[9], line 1 F.limit(X[Integer(0)]=Integer(3))
^ SyntaxError: expression cannot contain assignment, perhaps you meant
"=="?
Indeed, the current limit function and method get their arguments (va
On Saturday 28 September 2024 at 12:05:52 UTC-7 fqgo...@colby.edu wrote:
I wonder whether the result of ?min might mention the existence of
min_symbolic, and similarly for max. When the first attempt failed, I
looked at what ?min said, and didn't get much out of it. Had it mentioned
"see also m
Have you tried importing and using the module in Sage? Sage is ultimately
just a python library, with a bit of a modified shell to do some
preprocessing on the input to provide some conveniences for mathematics. I
would expect this module to just work.
If you're finding that there is a nontrivi
On Wednesday 25 September 2024 at 08:34:09 UTC-7 julian...@gmail.com wrote:
Hi Fernando,
I believe that problem is that:
sage: min(x, y)
x
It may be less than ideal, but given that "min" is a built-in function
which by the looks of it just picks the first element from its argument
such that o
ire expression
> print("a")
> with hold:
> held = Dt(SR(expression1))
> return held
> else:
> return sum(map(lambda
> arg:diff(expression1,arg)*Dt(arg),expression1.args()))
> ```
> How can I define this as a symbo
Dear erentar,
There are two types of objects involved here: "symbolic functions" that
live as objects in SR and "python functions" which are part of python
itself. "hold" is only a directive that applies to symbolic expressions,
whereas "def" defines a python function. Hence, the "hold" directi
By the looks of it, the place of failure is the same in both cases. In the
case of using maxima_lib, the maxima error generation doesn't quite work
though: as you can see, a condition RAT-ERR is not defined. That means
there is code that "throws" the condition, assuming there's a "catch" set
up
On Monday 29 July 2024 at 22:13:27 UTC-7 Andrew wrote:
[Not sure if this belongs here or in sage-dev...]
I am trying to implement coercions between algebras that are related by
base change. For example,consider
A=CombinatorialFreeModule(ZZ['x'], ['1','2'])
B=CombinatorialFreeModule(ZZ, ['1','2'
If you run `jupyter --paths` and `sage -sh <<<"jupyter --paths"` you see
the difference in paths. The relevant ones for you are probably the
sage-specific ones
$SAGE-LOCAL/var/lib/sage/venv-python3.10/share/jupyter
Whatever is there will get picked up by sage's jupyter but, naturally, not
by yo
On Monday 18 March 2024 at 06:45:17 UTC-7 Hellen Colman wrote:
"A graph represents an *antisymmetric relation* if ... "
It is not saying a graph is antisymmetric, but is introducing a new
definition of antisymmetric relation.
Ah, indeed! The person must have been interested in transitive rela
On Friday 15 March 2024 at 15:08:34 UTC-7 Hellen Colman wrote:
Let me just clarify the main point of his question just in case we can
still obtain a helpful answer. Essentially the question is: Why is Sage
calling "antisymmetric" to a property that is not the standard
antisymmetric property?
On Friday 15 March 2024 at 12:42:49 UTC-7 kcrisman wrote:
Or rather, should the default be useoffset False?
Yes, I think that would be reasonable to do. Clearly, offsets being used
without the user knowing they exist can easily lead to confusion and
misinterpreting the graph, as had been demon
I get the impression that without setting ymin,ymax you just end up with a
tiny range for the y-axis and its labelling is just very weird. I think the
labels displayed are shifted and scaled. So the error is just how the
labels are printed. That looks the same as
https://github.com/sagemath/sag
On Sunday 21 January 2024 at 04:25:42 UTC-8 Juan Grados wrote:
To protect the repo from arbitrary deletion, I need to know if Github
allows adding a rule to avoid a repository being deleted by a single
person.
If you encourage a workflow with forks and pull requests then everybody
will have t
The documented effect is usually of most impact:
https://maxima.sourceforge.io/docs/manual/maxima_46.html#index-domain
there may be other undocumented effects, but the one above tends to explain
a lot already.
On Sunday 3 December 2023 at 06:26:20 UTC-8 Oscar Benjamin wrote:
> What does "set d
(side note: Q is generally considered a PID, but indeed it makes little
sense worrying about Smith normal form over it)
Concerning the slow performance: from the documentation,
R._matrix_smith_form would allow an optimized routine to kick in. That
doesn't exist, though.
ZZ doesn't have it eith
On Monday, 30 October 2023 at 00:19:47 UTC+13 Kwankyu wrote:
What is your code?
P2. = ProjectiveSpace(QQ, 2)
f = 2*x^5 - 4*x^3*y*z + x^2*y*z^2 + 2*x*y^3*z + 2*x*y^2*z^2+ y^5
C = Curve(f)
kC = C.function_field()
D = kC(kC.base_field().gen(0)).differential().divisor()
L,m,s = (-D).function_space
On Monday, 30 October 2023 at 00:26:55 UTC+13 G. M.-S. wrote:
If I understand you correctly, SageMath is a bit loose at the moment about
its categories.
That's not what I meant also not what is indicated by what I noticed: by
the looks of it, sage does know about euclidean domains and has quit
On Saturday, 28 October 2023 at 18:50:12 UTC-7 Nils Bruin wrote:
On Saturday, 28 October 2023 at 15:26:35 UTC-7 Kwankyu wrote:
f1, f2, f3 are univariate polynomials (say in y) over rational function
field (say in x). Then x and y are not always the variables X and Y of the
coordinate ring of
On Saturday, 28 October 2023 at 15:26:35 UTC-7 Kwankyu wrote:
f1, f2, f3 are univariate polynomials (say in y) over rational function
field (say in x). Then x and y are not always the variables X and Y of the
coordinate ring of the affine plane. Things are more complicated if the
curve is in s
On Saturday, 28 October 2023 at 05:39:26 UTC-7 Kwankyu wrote:
I looked the Magma code in ask.sagemath. There's no problem in computing a
canonical divisor for the curve (through the attached function field).
Computing a basis of the Riemann-Roch space is no problem as well. Actually
the hard pa
e
polynomial ring over ZZ in 0 variables, you'd be good to go too. Free
ZZ-modules of rank 1 would also get you the right behaviour.
Guillermo
On Sat, 28 Oct 2023 at 18:44, Nils Bruin wrote:
I'm sure its omission is just an oversight. For fractional ideals in number
fiel
I'm sure its omission is just an oversight. For fractional ideals in number
fields it is defined:
sage: K.=QuadraticField(7)
sage: I=K.fractional_ideal(5)
sage: J=K.fractional_ideal(3)
sage: I.intersection(J)
Fractional ideal (15)
I doubt that just knowing a ring is a PID makes computing interse
On Friday, 27 October 2023 at 15:42:24 UTC-7 Nils Bruin wrote:
It doesn't look like we quite have computation of Riemann-Roch spaces
natively in sage yet
Correction, that DOES seem to be implemented as well:
sage: kC=C.function_field()
sage: D=kC(kC.base_field().gen(0)).differential().di
A canonical divisor is the divisor of any differential on C so the
following does the trick:
sage: kC=C.function_field()
sage: kC(kC.base_field().gen(0)).differential().divisor()
It doesn't look like we quite have computation of Riemann-Roch spaces
natively in sage yet, so finding effective rep
On Thursday, 26 October 2023 at 16:03:27 UTC-7 Eric Majzoub wrote:
I would like to debug the latex printing of an expression that ambiguous.
To reproduce it:
t = var('t')
x = function('x')(t)
latex( diff(x,t)^2 )
This produces ambiguous output, essentially:
partial_t x^2
instead of
(partial_t
I think it was written elsewhere that cysignals has not been ported to
cython 3.0.0 yet. In fact, sage as a whole hasn't been upgraded to compile
with cython 3.0.0 yet.
On Wednesday, 16 August 2023 at 06:57:05 UTC-7 JC wrote:
> Dear Sage developers,
>
> I'm trying to install the cysignals 1.11.
Perhaps superfluously: the reason why redefining `Integer` (in your example
through "from sympy import *") can break a command in sage that does not
seem to involve `Integer`:
sage: preparse("K = CyclotomicField(32)")
'K = CyclotomicField(Integer(32))'
Due to Sage's preparser, any use of intege
This response is very much in the "new direction or place to search"
category.
Sagemath's build process has been undergoing quite some changes. It used to
be the case that sage-the-distribution kept virtually everything in-house,
so that an install on shared folder would work great on a cluster
On Monday, 19 June 2023 at 12:10:49 UTC+2 ayan.mah...@gmail.com wrote:
Another crazy thing is that suppose I see 40% usage in memory and kill the
program by cntrl-c but keep sage running. Then I start a new process in
sage. The memory increases from 40%. As if there is some permanent stuff
sto
On Thursday, 1 June 2023 at 07:29:27 UTC-7 Luis Finotti wrote:
I am not sure I will miss them (and other packages that depended on it --
fflas-ffpack libgivaro-dev libgivaro9 liblinbox-dev python3-brial
python3-sage), but isn't there a way to force Jupyter to use Sage's one?
I don't think ju
On Wednesday, 31 May 2023 at 18:14:59 UTC-7 Luis Finotti wrote:
Here is one with your suggested change:
https://web.math.utk.edu/~finotti/misc/jl1.out
Here is one with the original version:
https://web.math.utk.edu/~finotti/misc/jl2.out
the line:
calling init: /usr/lib/x86_64-linux-gnu/libgi
On Tuesday, 30 May 2023 at 06:09:23 UTC-7 Luis Finotti wrote:
I looked at it, but I cannot tell if it is really the same issue, or how I
could check.
well ... it looks like the symbol that is found undefined is indeed of the
type mentioned there. So that would suggest that indeed a system giva
On Monday, 29 May 2023 at 10:51:27 UTC-7 Luis Finotti wrote:
Any ideas on how to fix it? Is it just me, or a bug with version 10.0? I
followed the same steps I've always followed:
https://doc.sagemath.org/html/en/installation/launching.html#setting-up-sagemath-as-a-jupyter-kernel-in-an-existin
On Monday, 29 May 2023 at 07:39:33 UTC-7 Luis Finotti wrote:
ImportError: /home/finotti/src/sage-10.0/src/sage/matrix/
matrix_modn_dense_float.cpython-311-x86_64-linux-gnu.so: undefined symbol:
_ZNK6Givaro7IntegercvNSt7__cxx1112basic_stringIcSt11char
_traitsIcESaIcEEEB5cxx11Ev
Any ideas on wha
On Wednesday, 3 May 2023 at 08:58:35 UTC-7 Nils Bruin wrote:
However, be careful:
sage: A=matrix(RR,2,2,[1,2,3,4])
sage: parent(A).is_exact()
True
because matrix rings presently aren't aware of inexactness of their base
rings.
This is something that is considered a bug; see
On Wednesday, 3 May 2023 at 08:21:39 UTC-7 G. M.-S. wrote:
Related to a recent discussion, is there a (simple) way to find whether an
expression contains non exact explicit numbers?
For symbolic expression you should probably walk the entire expression tree.
For sage objects, examining the par
On Wednesday, 3 May 2023 at 08:11:25 UTC-7 G. M.-S. wrote:
This gives an error:
sage: '' *in* CC
[…]
^
SyntaxError: invalid syntax
It looks like this error comes from the fact that "eval('')" raises this.
Apparently an empty string is not valid python for the parser. It is a
lit
Nice work!
For saving images of 3d-pictures: In the jupyter notebook with the
"threejs" viewer you can click on the "i" in the lower right corner. That
gets you a menu from which you can "sage as png". It will save a snapshot
of what you're viewing. You can also get camera and viewpoint from t
On Wednesday, 29 March 2023 at 13:46:04 UTC-7 Matthias Koeppe wrote:
On Wednesday, March 29, 2023 at 1:33:07 PM UTC-7 Nils Bruin wrote:
$ sage --help
...
Sage-the-distribution options:
--optional -- list all optional packages that can be installed
--experimental -- list all
On Wednesday, 29 March 2023 at 13:06:25 UTC-7 Matthias Koeppe wrote:
On Tuesday, March 28, 2023 at 10:18:23 PM UTC-7 Nils Bruin wrote:
[...] leads me to believe that it's probably nor possible to install
pynormaliz via "make" in a binary distribution.
If you install Sag
On Tuesday, 28 March 2023 at 21:06:26 UTC-7 Matthias Koeppe wrote:
On Monday, March 27, 2023 at 6:34:50 PM UTC-7 Nils Bruin wrote:
In my experience, sagelib needs rebuilding to interface with normaliz (I
think it's "make normaliz pynormaliz" nowadays, or perhaps one needs a pip
On Monday, 27 March 2023 at 17:47:54 UTC-7 Isuru Fernando wrote:
We used to have separate architecture specific builds, but `sage` is now a
meta-package that is architecture neutral (i.e. noarch).
So, you get sage-9.8 for all architectures. We support sage-9.8 for the
following OS and architect
What would the current (Spring 2023) easiest instructions be for people to
install sage? I'm asking in support of an install-fest for students, so the
objective is to have easy solutions for giving students access on whatever
platform they have available.
I know about cloud-based solutions, so I
On Saturday, 11 February 2023 at 01:51:47 UTC-8 Dima Pasechnik wrote:
>
>make -j8 normaliz pynormaliz
>
> "sage -i" is obsolete - at least in my mind :-)
OK -- thanks! so what used to be "spkg"s are now makefile targets. That
reduces the possibility of having "third party" spkgs -- I guess th
On Tuesday, 7 February 2023 at 09:56:06 UTC-8 Dima Pasechnik wrote:
> I don't think setting MAKE is a good idea.
>
> Did you try simply
>
> make -j8 build
This actually causes a bit of a problem when you want to install additional
packages, like `sage -i normaliz pynormaliz`: I wouldn't know
On Tuesday, 7 February 2023 at 09:56:06 UTC-8 dim...@gmail.com wrote:
I don't think setting MAKE is a good idea.
Did you try simply
make -j8 build
Thanks! I've tried "touch src/sage/structure/*" -- that triggers quite a
large part of sagemathlib to be rebuilt. It used only 4 processes dur
For the trac-to-github transition I decided to move over my git upstream
and origin. That all seems to have worked fine and I pulled the latest
develop and ran "make configure" (was already happy) and then "make". This
worked fine for the most part and with export MAKE="make -j8" it went quite
On Sunday, 9 October 2022 at 08:45:36 UTC-7 Emmanuel Charpentier wrote:
> ... and all is not fresh in Sympy's realm either.
>
> Full details in [this ask.sagematjh.org question](
> https://ask.sagemath.org/question/64344/solving-a-system-of-linear-equations-with-complex-numbers-yields-false-soluti
On Sunday, 4 September 2022 at 10:31:42 UTC-7 george...@gmail.com wrote:
> All,
> I am about to submit a math paper to a journal. I would like to include a
> proper citation for Sage. The Sage web page says:
>
> "Also, be sure to find out which components of SageMath, e.g. NumPy, PARI,
> GAP, Sa
On Wednesday, 1 June 2022 at 05:41:33 UTC+2 hongy...@gmail.com wrote:
> On Wednesday, June 1, 2022 at 1:55:45 AM UTC+8 Nils Bruin wrote:
>
>> The "GO" mentioned here should correspond to the O(3;1) (or perhaps
>> O(1;3) ) mentioned in the wikipedia article.
>>
&
you need might help an expert
in giving you further tips.
On Tuesday, 31 May 2022 at 08:43:54 UTC+2 hongy...@gmail.com wrote:
> On Sunday, May 29, 2022 at 6:27:18 PM UTC+8 Nils Bruin wrote:
>
>> It depends a little on what coefficients you want. If you're happy with
>>
It depends a little on what coefficients you want. If you're happy with
rational numbers then this should do the trick:
G = diagonal_matrix(QQ,4,[-1,1,1,1])
lorentz_group = GO(4,QQ,invariant_form=G)
which just constructs the group of (in this case QQ-valued) matrices that
preserve the quadratic
On Thursday, 5 May 2022 at 02:03:30 UTC-7 Ha wrote:
> For Example: I tried this:
>
> f(X[1] = 1, X[2] = 5)
>
> and got this error:
>
> File "", line 10 f(X[Integer(1)] =
> Integer(1), X[Integer(2)] = Integer(5))
> ^ SyntaxError: keyword can't be an expression
>
> Indeed, that does not work. Th
Can you explain a little more about what does not work? When I try to
replicate your example, everything works as expected:
sage: n=2
: F = GF(7)
: Rx=PolynomialRing(F,n,'x')
: X=Rx.gens()
sage: f=X[0]+X[1]
sage: f(x0=1)
x1 + 1
sage: f(x0=1,x1=1)
2
Alternatively you can evaluate usin
On Saturday, 16 April 2022 at 05:37:16 UTC-7 list...@gmail.com wrote:
>
> Thanks Samuel and Emmanuel.
>
> Follow up question: Why does
> var('lambda',n=1)
> fail?
>
Because the code in question tests the string actually passed in for
whether it's a valid python identifier.
Probably this is bec
On Sunday, 6 March 2022 at 09:13:42 UTC-8 list...@gmail.com wrote:
>
> Beginner's questions, I guess.
>
> Some time ago, Emmanuel Charpentier wrote
>
> var("v", n=2)
>
> which gives
>
> (v0, v1)
>
> Where is this documented? I have been unable to find keywords for var
> other than domain and lat
On Friday, 11 February 2022 at 07:51:17 UTC-8 mille...@gmail.com wrote:
> I'm trying to do some least squares linear algebra. I built a matrix from
> lists that I converted into column vectors and used the 'augment' function.
Small detail, but slightly more efficient (it may not matter for your
On Monday, 31 January 2022 at 15:19:49 UTC-8 Emmanuel Charpentier wrote:
> As advertised, an atempt at a minimal (non-)working example :
>
> # Reproducible minimal example
> with seed(0): M = matrix(AA, 3, 3, lambda u,v: AA.random_element())
> # Working ring
> WR = M.base_ring().algebraic_closure(
On Saturday, 29 January 2022 at 13:51:14 UTC-8 Emmanuel Charpentier wrote:
> /usr/local/sage-9/local/var/lib/sage/venv-python3.9/lib/python3.9/site-packages/sage/rings/qqbar.py
>
> in pari_field(self)
>
>>3134 if self._pari_field is None:
>>3135 pari_pol = self._fi
In a blizzard?
P=sage.plot.graphics.Graphics()
P.show(axes=False)
In general, though, this is not a very mathematical question, nor one for
which a computer algebra package is going to be the best tool. Perhaps if
you give some more context, someone will be able to give you more useful
help.
That's a python question. See for instance,
https://stackoverflow.com/questions/2582138/finding-and-replacing-elements-in-a-list
If you scroll down, there are some suggestions there that deal with
multiple replacements as well
On Tuesday, 28 December 2021 at 06:09:35 UTC-8 cyrille piatecki wrot
The "regulator" access routine should indeed at least allow to produce the
regulator with the precision that pari used.
If you look at the source of "regulator" you can see how to get the
regulator to better precision. If K is your number field, then:
K.pari_bnf().bnf_get_reg().sage()
gets you
I think Ubuntu 18.04 might only have an old, python2-based, version of
sagemath packaged:
https://packages.ubuntu.com/bionic/sagemath
https://www.sagemath.org/download.html does host binary builds for 18.04,
so downloading from there could get you version 9.4, which does run on
python3. Or you
On Wednesday, 8 September 2021 at 09:24:15 UTC-7 max...@gmail.com wrote:
> Hi Simon,
>
> Thank you for your insight, and let me state that I
> find InfinitePolynomialRing useful in combinatorics to deal with
> (truncated) multivariate generating functions with apriori unknown number
> of variab
On Wednesday, 8 September 2021 at 07:30:21 UTC-7 Simon King wrote:
>
> As I said, differentiation is not supposed to work. But I (as original
> author) don't fully understand *why* it sometimes works and how to fix
> that (by "fix", I mean "make it not work and, in the best case, suggest
> to c
I'd suspect the problem is not the ray tracing but the description of the
object. Probably, `parametric_plot` produces a description of your shape
with tubular segments and with a min_depth=20 it probably produces *very*
many of them. So you probably don't get to ray tracing: you're stuck in
co
On Thursday, 8 July 2021 at 09:49:18 UTC-7 Emmanuel Charpentier wrote:
> Dear Nils, dear list,
>
> Le jeudi 8 juillet 2021 à 01:01:44 UTC+2, Nils Bruin a écrit :
>
>> I think the main problem in f(x) is a preparser problem:
>> https://trac.sagemath.org/ticket/11621
&
I think the main problem in f(x) is a preparser problem:
https://trac.sagemath.org/ticket/11621
The other problems could just be numerical instability. The normal
precision is 53 bits, which is good for about 16 decimal digits. The
constants in the formula are more than that, so if there is sig
Thank you all! I needed a few steps here that were mentioned on
aka.ms/wsl2-install :
dism.exe /online /enable-feature
/featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all
/norestart
(restart)
wsl --set-defaul
just a
tablet to write on and as a tablet OS, win10 seems to be performing just
fine). I think the students who'd be using Win10 for development would have
beefier machines.
On Tuesday, 1 June 2021 at 01:36:31 UTC-7 dim...@gmail.com wrote:
> On Tue, Jun 1, 2021 at 2:25 AM Nils Bruin wrot
Update:
wsl --help isn't particularly eager to divulge version information, but
some of it inadvertently has slipped through: in the description of the
"--shutdown" option there is a mention of "the WSL 2 lightweight utility
virtual machine",
so unless wsl has a mysterious option that has a side
On Monday, 31 May 2021 at 17:57:34 UTC-7 wst wrote:
> I also think there are some subtleties with WSL versus WSL2 - which were
> you actually using? They are dramatically different technologies…
How do I tell which one I'm running as a user? I wasn't particularly
planning on learning how to us
Asking for a friend ... or rather linux-challenged students:
What's the most convenient and workable way of running sage on Win10 if you
want to do a moderate amount of sage development as well (so, things like
`sage -b` or `make build` should probably work, as should `git track push`
etc.) ?
I
On Monday, January 25, 2021 at 7:09:32 AM UTC-8 Nikos Apostolakis wrote:
> Dear Nils,
>
> [...] I think treating rational integers as integers is safe. Actually
> Sage does that
>
> sage: 8/2 in ZZ
> True
>
>
> So to have a function with integer input throw an error when you feed it a
> rationa
On Monday, January 25, 2021 at 7:16:00 AM UTC-8 ... wrote:
> Is this the same as derivative(f(xp(x, y, z, t), yp(x, y, z, t), zp(x, y,
> z, t), tp(x, y, z, t)) , x, 2)?
>
> No, it is not. Look up "Multivariable Chain rule".
--
You received this message because you are subscribed to the Google G
On Thursday, January 21, 2021 at 7:21:52 AM UTC-8 Nikos Apostolakis wrote:
> Dear Vincent,
>
> Thank you very much, that fixes it.
>
> IMHO this is a bug though, or at least an inconsistent behavior. Most of
> the time Sage silently coerces things to the appropriate type so commands
> just wor
I suspect you want to collect wrt. the second partial derivatives of
f(x,y,z,t) with respect to x,y,z,t ; evaluated at xp,yp,zp,tp. Those are
not the same as the partial second derivatives of f(xp,yp,zp,tp) with
respect to (x,y,z,t). If you inspect what derivative(f(xp, yp, zp, tp), x,
2) gives
On Sunday, November 29, 2020 at 1:23:36 PM UTC-8 list...@gmail.com wrote:
>
> I agree with you, but at the same time I wonder what would be wrong with
> replacing
> '!' → '.factorial()'
>
> Good observation: python already has postfix operators! I still don't like
factorial notation; not even i
With the current regexp-based rewriting we'd need a pattern of the kind
'!' -> 'factorial( '**" but that's very
basic and doesn't need any context. To change an implicit unary postfix
operator to an explicitly parenthesized prefix operator need almost
complete parsing. Had the factorial been ex
On Thursday, September 10, 2020 at 6:50:11 AM UTC-7, cyrille piatecki wrote:
>
>
> I would like to know is there is a way to centerr results in SageCells.
>
I'd expect that with a cunning use of CSS style sheets, you can pretty much
change any aspect of the formatting. It would require that you e
On Friday, August 28, 2020 at 10:36:20 AM UTC-7, Dima Pasechnik wrote:
>
> technically, money goes to a registered charity Open Collective, which
> takes a 10% cut for admin etc costs (and Stripe takes a cut, too) and gives
> the rest to us. At least the setup is very easy - noone had time so far
Thank you for setting this up! It looks like a very generous move from
GIthub to run the donation collection infrastructure and still give 100% to
the sponsored party. I think people might be more inclined to donate if it
were clearer where the money went. Is it the intention that this money go
On Wednesday, August 19, 2020 at 5:24:48 AM UTC-7, Paul Leopardi wrote:
>
> See also
> https://groups.google.com/g/sage-support/c/3WKui-LojKs/m/DgEPBGF3AQAJ and
> https://trac.sagemath.org/ticket/28444
>
> On Wednesday, 19 August 2020 at 22:17:40 UTC+10 Paul Leopardi wrote:
>
>> Hello,
>> I am cu
On Sunday, August 16, 2020 at 4:22:22 AM UTC-7, Dima Pasechnik wrote:
>
>
> I guess this has to do with Python hashing; objects are not checked
> for `==` equality when you do {},
> but for equality w.r.t. to certain internal representation:
> sage: g = libgap.SymmetricGroup(3)
> sage: x = g.Su
On Wednesday, August 5, 2020 at 10:19:57 AM UTC-7, john_perry_usm wrote:
>
>
> It's possible that you want a local term ordering. Unlike global term
> orderings, in a local ordering 1>t for any monomial t.
>
> TO = TermOrder("negdegrevlex",3)
> R = PolynomialRing(GF(2),'x',3,order=TO)
> R.inject_v
On Wednesday, August 5, 2020 at 4:28:42 AM UTC-7, Santanu wrote:
>
> Dear all,
> Consider ideal I= over the binary field GF(2).
> Then (x2).reduce(I) gives x2. I want it to be x0*x1.
> In fact , I want this kind of reduction always should give quadratic
> polynomial
> (I know that this is p
On Monday, August 3, 2020 at 9:26:38 PM UTC-7, Tim McLarnan wrote:
>
> I tried copying the kernel folders from CoCalc and editing them in what I
> thought was the right way and putting them with the kernel folders on my
> machine. This produced kernels that show up in Jupyter, but that don't
>
On Thursday, June 18, 2020 at 12:18:40 AM UTC-7, Dima Pasechnik wrote:
>
>
> Python's print() function allows you to do formatting, whereas show() is
> just a quick hack.
>
> little correction here: python's strings allow you to do formatting,
meaning that whatever formatting you want to do, you
On Friday, May 1, 2020 at 12:30:10 PM UTC-7, John Atom wrote:
>
> If I define a function:
>
> f(x) = x**2
>
> and then print it, sage always prints it as `x^2`.
>
> Is it possible to change the default output of the power operator to '**'
> ?
>
I suspect it will be hard, because these "^" are
On Friday, April 10, 2020 at 1:05:15 PM UTC-7, Ne reknu wrote:
>
> Thank you for your answer. Unfortunatelly the numpy.vectorize(Rce)
> generates the very same error (I tried to plot it). Or pehaps I
> misunderstood your intention?
>
No, my guess would have been that would work, but then appare
On Friday, April 10, 2020 at 1:02:12 AM UTC-7, Ne reknu wrote:
>
> Hello.
> I need a root finder of a real function which work with a initial guess.
> That can be done by scipy fsolve, but if I try to aply it on a gamma (or
> Bessel) function in Sage, I recieve following error message:
>
> NotIm
On Tuesday, March 10, 2020 at 6:22:45 AM UTC-7, Dima Pasechnik wrote:
>
> Suppose I have
>
> R.=QQ[]
> K.=QQ[]
> f=R.hom([u*v,u^2,v^2-u^2])
>
> then for any even degree p in K one can compute
> a preimage under f (e.g. u^4-u*v goes to y^2+x, etc)
>
I think the general way (which should be pr
http://doc.sagemath.org/html/en/reference/calculus/sage/calculus/var.html#sage.calculus.var.function
--
You received this message because you are subscribed to the Google Groups
"sage-support" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sage-support
1 - 100 of 560 matches
Mail list logo
