I can't reproduce your problem (using the server at www.sagenb.org). I ask :
var('x, p, q')
assume(p,'integer'); assume(p0)
assume(q,'integer'); assume(q0)
fun = exp(-x^2) * x^(2*p) * x^q
A = integral(fun, (x,-oo,oo))
B = integral(fun, (x,-oo,0)) + integral(fun, (x,0,oo))
then I ask for A :
I am in the process of learning Sage, coming from Maxima (and Mathematica,
which I do not like much...).
Cut'n'pastes from a notebook running on sagenb.org
version()
version()
==
'Sage Version 5.4, Release Date: 2012-11-09'
var('t,a,b,d')
## beta density
Dear Sir,
Thank you for your prompt advice. Some comments below :
Le vendredi 21 décembre 2012 15:03:45 UTC+1, kcrisman a écrit :
I am in the process of learning Sage, coming from Maxima (and
Mathematica, which I do not like much...).
Cut'n'pastes from a notebook running on sagenb.org
Dear list,
Le vendredi 21 décembre 2012 21:22:31 UTC+1, kcrisman a écrit :
That's a substantial difference, IMHO.
If you do a+b, then Python calls a.__add__(b). So, Python being object
oriented, you can easily overload the a.__add__ method. Sage has the
class
Le vendredi 21 décembre 2012 20:31:42 UTC+1, KnS a écrit :
Emmanuel wrote: Please let me know how to comment a ticket, and I will
report this.
I think the usual procedure is to request a TRAC account (the details of
how to request are outlined in the SAGE TRAC homepage).
HTH,
It
Dear Simon,
Thank you for that prompt answer.
I have a couple of comments below :
Le samedi 22 décembre 2012 13:18:32 UTC+1, Simon King a écrit :
Hi Emmanuel,
On 2012-12-22, Emmanuel Charpentier emanuel.c...@gmail.com javascript:
wrote:
So, if I follow you, Sage's add was designed
Note to (potential) users of the sage interface to Mathematica : something
seems to have changed in Mathematica version 9 interface with the rest of
the world.
Setup(s) : Debian wheezy with self-compiled sage v 5.4.1 then v 5.5,
Mathematica Linux 64 bits V8 then V9.
(1) sage v 5.4 --
A second attempt gives exactly the same result (modulo downloading).
I see no intelligent action to take now. If some wiser soul can suggest a
stupid one ...
HTH,
Emmanuel Charpentier
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To post
perfectly. Thank you very much !
This is probably a better choice anyway, since it matches the version of
GAP installed with Sage.
Huh ? So why the recommendation to install a newer version ?
Thank you again !
Emmanuel Charpentier
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) one, or should you always kill all the processes ?
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sage
Thank you very much !
Emmanuel Charpentier
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Ticket #13892 http://trac.sagemath.org/sage_trac/ticket/13892 created as
suggested.
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Same problem here with firefox and chromium (linux 64 bits).
HTH,
Emmanuel Charpentier
Le jeudi 3 janvier 2013 11:52:43 UTC+1, P Purkayastha a écrit :
Is it really a problem with fonts? I get the same error on opera
Forgot to add : the debian fonts-stix package *is* installed.
Le jeudi 3 janvier 2013 15:04:10 UTC+1, Emmanuel Charpentier a écrit :
Same problem here with firefox and chromium (linux 64 bits).
HTH,
Emmanuel Charpentier
on Mathematics...
Question : can one use Sage for abnormal work in rural areas ? or for
normal work in urban areas ?
Back to my semi-abnormal work in an overly urban area...
Emmanuel Charpentier
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[ Snip... ]
Any advice ?
Go for it! Create a Trac ticket and post a new spkg.
I will do that. But not immediately : RealLife(TM) has its exigences...
Emmanuel
Charpentier
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Le jeudi 24 janvier 2013 21:01:33 UTC+1, Emmanuel Charpentier a écrit :
[ Snip... ]
Any advice ?
Go for it! Create a Trac ticket and post a new spkg.
I will do that. But not immediately : RealLife(TM) has its exigences...
[ Later ] almost done :
dropping the new source code
Go for it! Create a Trac ticket and post a new spkg.
Done. That's ticket #14008 http://trac.sagemath.org/sage_trac/ticket/14008
now.
Still incomplete (lacking the patches for doctests, which will be done
probably tomorrow).
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? ?
- had you X access at time of use ?
- had your server X access at time of use ?
Any turther comments, toughts, ideas (barbs if deserved) are, of course,
welcome.
Sincerely yours,
Emmanuel Charpentier
to the
local startup files of the machine (via sudo, probably)
But that amounts to use a missile to kill a gnat. This workaround is not a
solution.
HTH,
Emmanuel Charpentier
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This is now ticket#14071 http://trac.sagemath.org/sage_trac/ticket/14071,
for archiving support. Any information still eagerly sought for, no plan to
attack this soon, due to RealLife(TM) constraints.
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it...),
Emmanuel
Charpentier
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This seems ECL-specific. A GCL-based Maxima installation does not encounter
this (and does not solve the problem either) :
Maxima 5.29.1 http://maxima.sourceforge.net
using Lisp GNU Common Lisp (GCL) GCL 2.6.7 (a.k.a. GCL)
Distributed under the GNU Public License. See the file COPYING.
Dedicated
Dear Jose,
Le mercredi 27 février 2013 14:18:45 UTC+1, Jose Guzman a écrit :
I am trying to find the maximun of an exponential expression of the form:
sage: t=var('t')
sage: g(t) = e**(-t/10)-e^(-t/2)
between 0 and say 50. My idea is to get the maximun to normalize the
function to
Le samedi 2 mars 2013 17:00:15 UTC+1, Emmanuel Charpentier a écrit :
[ An idiocy ... ]
[ Snip... ]
pSince s1 is nbsp;irst-degree equation in t, this is the only real
nonnegative maximum (it is easy to show that there is no negative
maximum)./p
pNow, try brute force via the to_poly_solve
to specify latex parameters for edges and
vertices has no point, since these setups are forgotten by the new style
(and yes, I tried to use two set_latex_options instructions : same results
in both orders...).
Any hint ?
Emmanuel Charpentier
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Dear list,
I quite recently installed sage_mode 0.9.1 on my installation of sage 5.9
(patched with a newer R version) on Debian jessie.
The firs try is a charm : output gets typeset in emacs (emacs24), plots are
plotted (a bit too wide and way too tall for an 80x24 frame, but that's not
my
emacs.
Emmanuel Charpentier
Le mercredi 19 juin 2013 15:50:48 UTC+2, Emmanuel Charpentier a écrit :
Dear list,
I quite recently installed sage_mode 0.9.1 on my installation of sage 5.9
(patched with a newer R
at the source code for GraphLatex (wich I haven't yet located,
shame on me...).
Emmanuel
Charpentier
BTW : tex.stackexchange.com gave me few hints about this problem : people
here tend to hack their solutions directly in \LaTeX
installations, all of them run Debian testing (updated often).
Heisenbug ?
Sincerely,
Emmanuel Charpentier
-Ivan
On Jun 19, 2013, at 11:10 AM, Emmanuel Charpentier
emanuel.c
for tomorrow afternoon... Stay tuned !
Thank you very much for your attention,
Emmanuel
Charpentier
Le jeudi 20 juin 2013 20:44:08 UTC+2, Ivan Andrus a écrit :
On Jun 20, 2013, at 8:32 AM, Emmanuel Charpentier
emanuel.c
a good reason for
it.
Schrödinbug ??
Again, thank you for your time and your help !
Emmanuel Charpentier
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that this behavior is avoided, so that the above will return 2 x instead?
Shouldn't that be 2{}x instead ? Just asking...
Emmanuel Charpentier
~Brian
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word on cross compilation.
Any hint ? Even You're barking to the moon... would be useful.
Emmanuel Charpentier
PS :of course, I could also use this problem as an excuse to get myself a
better notebook :-). But that won't fly with my financer (i
Dear William,
Le dimanche 14 juillet 2013 21:54:57 UTC+2, William a écrit :
On Sun, Jul 14, 2013 at 12:30 PM, Emmanuel Charpentier
emanuel.c...@gmail.com javascript: wrote:
I wonder how to create an i686 executable on an amd64 machine.
Rationale : I want to use sage on an an aging
session with Sage's makefiles, which are *not* that simple, to add the
relevant flags. I am a bit out of my depth here...
Emmanuel Charpentier
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Dear William,
Le lundi 15 juillet 2013 à 00:48 -0700, William Stein a écrit :
On Mon, Jul 15, 2013 at 12:15 AM, Emmanuel Charpentier
emanuel.charpent...@gmail.com wrote:
Dear William,
Le dimanche 14 juillet 2013 21:54:57 UTC+2, William a écrit :
On Sun, Jul 14, 2013 at 12:30 PM
Something seems to have changed either in my Sage or my Python
installation, but I can't diagnose it :
I wanted to compile (again) the sagetex documentation. Compiling
sagetex.dtx was a breeze (pdflatex sagetex.dtx ; sage sagetex.sagetex.sage
; pdflatex sagetex.dtx).
pdflatex example.tex went
answers (checked by a %maxima cell in the notebook),
its native answer is the same error.
Therefore, this bug is old...
HTH
Emmanuel
Charpentier
Le jeudi 25 juillet 2013 18:16:01 UTC+2, Victor Miller a écrit :
In the latest version
be added to
Trac#14976http://trac.sagemath.org/ticket/14976or reported elsewhere ?
Emmanuel
Charpentier
[ Snip... ]
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Comments and (horrible !) workaround in
Trac#14976http://trac.sagemath.org/ticket/14976
.
HTH,
Emmanuel Charpentier
[ Snip ... ]
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Maxima.console allows for direct communication between user and maxima,
whereas maxima.interact still filters input and output. Compare :
sage: maxima.console()
;;; Loading #P/home/charpent/sage-5.10/local/lib/ecl/sb-bsd-sockets.fas
;;; Loading
As far as I can tell, there is no simple way to call maxima's changevar
function from maxima. It is, however, sometimes quite useful for solving
some integrals. Consider foo(x)=e^((m - x)/s)/((e^((m - x)/s) + 1)^2*s) :
in maxima, changevar allows for easy checking that
On 02/08/2013 15:16, William Stein wrote:
On Fri, Aug 2, 2013 at 5:54 AM, Emmanuel Charpentier
emanuel.charpent...@gmail.com wrote:
[ Snip... ]
In the maxima.interact() call, sage sees the question from maxima, and
acts accordingly (here, suggests an assumption that cannot be made
,
Emmanuel Charpentier
[ Snip... ]
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An important precision : what I said is true about maxima 5.30.0 (i. e.
the latest released maxima, used standalone), *not* 5.29.1 (currently in
sage). See below :
On 14/08/2013 15:04, Emmanuel Charpentier wrote:
[ Snip ... ]
[ 1st part of sage computation ]
sage: Lt
x14^4 + 2*((x14^4)^(1/4
compiled erfectly wit tikz-rts uncommented in sage-5.9.
Could some kind soul give me a pointer ?
Emmanuel Charpentier
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Code enclosed (I think that you want my TeX sources...).
Le jeudi 15 août 2013 à 12:45 -0700, William Stein a écrit :
[ Snip ... ]
Please post a link to all your input code...
--
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Professor of Mathematics
University of Washington
http://wstein.org
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a function) leads to a correct compilation, giving the
expected results. in the PDF. See enclosed source...
Therefore the problem might be specific to graphs plotting (or to graphs).
HTH,
Emmanuel
Charpentier
Le jeudi 15 août 2013 23:21:49 UTC+2
!
Emmanuel Charpentier
Le jeudi 15 août 2013 21:40:04 UTC+2, Emmanuel Charpentier a écrit :
I already reported problems with sagetex (version 5.10). Perusing the
sage-support archive hinted at possible problems due to deficient
installation with a semi
,
Emmanuel Charpentier
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Dear Burcin, dear list
Le mardi 27 août 2013 11:16:18 UTC+2, Burcin Erocal a écrit :
On Sat, 24 Aug 2013 14:16:01 -0700 (PDT)
Emmanuel Charpentier emanuel.c...@gmail.com javascript: wrote:
Dear list,
[ Snip.. ]
h=g(x,m1,m2,s1,s2) # to get a symbolic expression
print
let the real function
f(x)=(2-sqrt(x+1))/(x-3)
Sage has no difficulty finding the limits at x=-1 and x=3. However, I am
unable to get plot to detect these singularities :
plot((2-sqrt(x+1))/(x-3),[x,-1,6],figsize=4,detect_poles=True)
gives me a continuous curve between -1 and 6 with no marking
remember having had analogous problems with such
moved installations of sage (pertaining to other R packages using C++
libraries).
Questions :
Is this a bug ? Worth a ticket ?
2) if so, should I report it ? With which tags ?
Sincerely,
--
Emmanuel Charpentier
PS : I'll try an in place
shared libraries it is a bit of a gamble... The only correct solution is to
not set LD_LIBRARY_PATH.
Again : how do you do that ?
Anyway, thank you very much for your help !
--
Emmanuel Charpentier
On Tuesday, December 17, 2013 8:41:52 PM UTC, Emmanuel Charpentier wrote:
I compiled
A couple more data points :
1) on a smaller machine (but still amd64 and Debian testing), sage 5-13
compilation from sources gave me an R spkg that **has** graphics
capabilities. But for the life of me, I can't pinpoint what is installed on
the small machine that enables those capabilities and
to / in unix paths unless it
is an the beginning.
That's what I thought, but R's dyn.load might be different (however, trying
to dyn.load R's X11 library with a corrected path gives the same result as
with the original path).
On Wednesday, December 18, 2013 8:23:51 PM UTC, Emmanuel Charpentier
post on
sage-release (Today is a good day to die, indeed...). And the main Sage
Web page still points at 5.13...
On Friday, December 20, 2013 6:21:00 PM UTC, Emmanuel Charpentier wrote:
Dear Volker,
Le mercredi 18 décembre 2013 22:23:21 UTC+1, Volker Braun a écrit :
I get the same error
for updating the docs to Sage 6?
On Friday, December 20, 2013 6:21:00 PM UTC, Emmanuel Charpentier wrote:
Dear Volker,
Le mercredi 18 décembre 2013 22:23:21 UTC+1, Volker Braun a écrit :
I get the same error, btw. Your big machine machine has a better
freetype or more/different fonts. The error
...
If a kind soul could point me to the direction(s) and module(s) of my
error(s), I'd be grateful.
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://www.sagemath.org/packages/upstream/
On Sunday, December 22, 2013 9:32:57 AM UTC, Emmanuel Charpentier wrote:
Dear list
I noted problems with freetype on my machine ; Volker Braun diagnosed (in
this
thread https://groups.google.com/forum/#!topic/sage-support/FnTEcpfg6wE)
that the current sage's
Thanks to Volker's explanations, the relevant
tickethttp://trac.sagemath.org/ticket/15561 is
again at needs review.
Thanks a lot for your help.
--
Emmanuel Charpentier
Le dimanche 22 décembre 2013 16:22:42 UTC+1, Emmanuel Charpentier a écrit :
Thank you very much, Volker ! I definitely need
Thank you. I missed that online help. Silly me...
--
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Le dimanche 22 décembre 2013 16:39:27 UTC+1, Volker Braun a écrit :
The dev object in Sage is equivalent to the sage -dev command line.
Arguments are translated between Python to Shell calling conventions, so
$ sage
time to test these trials, used the original mindless port
of upstream source and encountered no problems in 5.11 and 5.12.
Hence my question : did users of the newer fixed spkg encounter such
problems on Debian machines ?
HTH,
--
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HTML.
Tapez 'q()' pour quitter R.
[Sauvegarde de la session précédente restaurée]
bar-function (x) {
+ y-x+3)
Erreur : ')' inattendu(e) in:
bar-function (x) {
y-x+3)
As William said, an example is necessary...
HTH,
--
Emmanuel Charpentier
Le vendredi 21 février 2014 17:18:59 UTC+1, Fred
,
--
Emmanuel Charpentier
Regards,
Jan
On 19 April 2014 14:33, xunitc xc xun...@gmail.com javascript: wrote:
Hi,
My os is ubuntu 14.04, I use the ppa like :
apt-add-repository -y ppa:aims/sagemath
apt-get update
apt-get install sagemath-upstream-binary
Then, I see sagemath-upstream
an intermediate new version which is the same version of sagemath
but with new dependencies.
Thank you for that. One of the points of using ubuntu is not to have to
worry about building binaries. It still will be 6.1.1, right ?
--
Emmanuel Charpentier
Regards,
Jan
On 19 April 2014 16:13
that
won't update, but I won't bother with it for now.
I will be continuing the thread on sage-devel to get a better set of
Depends/Recommends/Suggests.
I look forward to it. Thanks again !
--
Emmanuel Charpentier
Regards,
Jan
On 20 April 2014 00:53, xunitc xc xun...@gmail.com javascript
a way to coax matplot to use its built-in interface to tikz. But
the damn thing is quite opaque to me. Any idea ?
[ BTW : this (rendering via tikz) might be a nice enhancement for sagetex
users... Hmmm... I'll have to dive in the source code. Not for now, alas...
]
HTH,
--
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Le
?
Sincerely yours,
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Update : same problem (same symptoms) wuth the Ubuntu ppa package under
Ubuntu 14.04.
HTH,
--
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Le mardi 13 mai 2014 08:46:21 UTC+2, Emmanuel Charpentier a écrit :
Dear list,
I just installed sage 6.2 from source on Deblan testing/amd64 ; I also
installed sage_mode
)
255 self._magic_display_status = mode
256
ValueError: unrecognized display type typeset
In other words, the ability may exist but is unreachable...
HTH,
--
Emmanuel Charpentier
Le mercredi 14 mai 2014 04:22:36 UTC+2, Ivan Andrus a écrit :
It looks like `%display typeset
The call :
plot(sin(x),[x,0,2*pi],figsize=4)
does produce the expected plot in the notebook.
In emacs with sage_mode version 0.11, it does display the plot in a viewer
window when inline plots are disabled, but displays nothing (with no error)
when inline plots are enabled.
Yet another
Bump (bug filed on the home website).
Le dimanche 20 juillet 2014 13:18:42 UTC+2, Emmanuel Charpentier a écrit :
The call :
plot(sin(x),[x,0,2*pi],figsize=4)
does produce the expected plot in the notebook.
In emacs with sage_mode version 0.11, it does display the plot in a viewer
window
)/sqrt(a^2 + x^2 + z(x)^2) + 2*x
HTH,
--
Emmanuel Charpentier
Le samedi 26 juillet 2014 19:13:32 UTC+2, Chris Maness a écrit :
I would like to take the derivative of a function defined as as such that:
f(x,z)=(2*x+2*z*(dz/dx))/sqrt(x^2+a^2+z^2) and z=z(x) (z is an
unknown function of x
cannot, to the best
of my knowledge, *remove* an spkg. One can, however, force installation
of an older version (with sage -f olderspkg).
Again, thank you very much !
--
Emmanuel Charpentier
Thanks,
Ivan
On Jul 23, 2014, at 3:24 PM, Ivan Andrus darth...@gmail.com javascript:
wrote
,
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://www.sagemath.org/doc/reference/ quick search
box.
I also checked that (my) manual *is* interactive (I can modify celle
contents and get relevant results). So I probably missed something in the
compilation configuration. The question is, of course, What ?.
Sincerely,
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Emmanuel Charpentier
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server, gets a Web page somewhat different from the raw file the browser
gets from the files of the local documentation.
I hope it's clear, but it's difficult to describe.
HTH,
--
Emmanuel Charpentier
Le dimanche 10 août 2014 13:38:58 UTC+2, Volker Braun a écrit :
The reference manual (http
: should function calls be counted or not ?
HTH,
--
Emmanuel Charpentier
Le mercredi 6 août 2014 16:53:30 UTC+2, Nasser M. Abbasi a écrit :
I searched for this but could not find it on google.
Is there a way in sage to determine the size of expression as given
typically by leaf count
of the home site. But that introduces behaviour differences between
command line sage and sage under emacs. Not good...
HTH,
--
Emmanuel Charpentier
Le lundi 11 août 2014 05:11:34 UTC+2, Ivan Andrus a écrit :
Thanks for reminding me. I released a new version of sage-mode (0.12—only
the version
/complex_number.c:5225)()
IndexError: i must be between 0 and 1.
Seems to be a problem with points().
Advice ? Ticket to create ?
HTH,
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?Something like the SMC notebook ?
Something else ?)
,
-Ivan
On Aug 11, 2014, at 1:04 AM, Emmanuel Charpentier emanuel.c...@gmail.com
javascript: wrote:
May I express a wish ?
The current solution uses the same output mode as the notebook. This has a
somewhat serious drawback : no debugging
Trac#16804 http://trac.sagemath.org/ticket/16804#ticket created.
It seems (see second example in the ticket) that pure imaginary (i. e.
real(x)==0) are plotted without problem.
HTH,
--
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Le mardi 12 août 2014 15:26:34 UTC+2, kcrisman a écrit :
sage: points(map(lambda x:x
or might not be what you want.
There are probably more steamlined ways to accomplish what you want, but
I'm only discovering Sage...
HTH,
--
Emmanuel Charpentier
Le lundi 18 août 2014 07:18:26 UTC+2, juaninf a écrit :
Dears members I need doing substitution of values vars_gf2subs in vars_GF
://github.com/sympy/sympy/issues/2803 in sympy ticket system).
Maybe a similar ticket should be opened for Sage, which has, as far as I
know, no way to represent a Dirac or a Heaviside function in SR...
HTH,
--
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Le vendredi 15 août 2014 23:04:08 UTC+2, David Joyner a écrit
updating my sage to see what happents with the current
(6.4beta3) sage.
Sincerely yours,
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Le jeudi 4 septembre 2014 20:17:38 UTC+2, Ivan Andrus a écrit :
Sorry it took so long to get back to you with a fix.
I have added the ability to use emacsclient+function to view plot
Sage 6.4beta3 works as 6.3 : the September spkg doesn't install, the 0.12
works as advertised in emacs.
HTH,
--
Emmanuel Charpentier
Le dimanche 14 septembre 2014 22:03:50 UTC+2, Emmanuel Charpentier a écrit :
Sorry for 10 days of silence : we are in the grant proposal season...
This spkg
created to avoid this kind of problems. Even trig functions
can be seen as special functions curtaining e^i*x, but their geometric
interpretation predates largely (by about two millenia) their analytic
expression ; this is why they are thought of as elementary.
HTH,
--
Emmanuel Charpentier
Le
)+1))*t+w==0,w)
[w == 1/2*t*sqrt(4*w + 2)]
sage: maxima.version()
'5.33.0'
What are you talking about, guys ?
HTH,
--
Emmanuel Charpentier
Le jeudi 16 octobre 2014 22:49:48 UTC+2, kcrisman a écrit :
sage: solve(-(1/2*sqrt((4*w+1)+1))*t+w==0,w)
[w == 1/2*sqrt(4*w + 2)*t]
Well, if I'm
Le vendredi 17 octobre 2014 16:37:55 UTC+2, vdelecroix a écrit :
2014-10-17 10:09 UTC, Emmanuel Charpentier emanuel.c...@gmail.com
javascript::
Ahem !
On one machine :
sage: sage.version.version
'6.4.beta4'
sage: var(w,t)
(w, t)
sage: solve(-(1/2*sqrt((4*w+1)+1))*t
?
HTH,
--
Emmanuel Charpentier
Le vendredi 17 octobre 2014 23:00:28 UTC+2, Emmanuel Charpentier a écrit :
Le vendredi 17 octobre 2014 16:37:55 UTC+2, vdelecroix a écrit :
2014-10-17 10:09 UTC, Emmanuel Charpentier emanuel.c...@gmail.com:
Ahem !
On one machine :
sage
expressions.
Is that one known ? Should it be reported to either a new ticket or an
existing one ? Skimming trac for domain didn't turn up anything
significant...
HTH,
--
Emmanuel Charpentier
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I just noticed that sage 6.4rc1 breaks sage_mode : launching sage with M-x
sage never returns. Emacs is unresponsive in all of its buffers. : you have
to kill emacs to get out of this mess.
Now compiling rc2 to test this a bit further.
HTH,
--
Emmanuel Charpentier
--
You received
A bit later :
Same problem with 6.4rc2. Hints for debugging welcome...
BTW : still no typeset mode possible in the new notebook, as far as I can
tell. I understand that this was to be expected.
HTH,
--
Emmanuel Charpentier
Le mercredi 12 novembre 2014 21:36:44 UTC+1, Emmanuel Charpentier
the instructions...
--
Emmanuel Charpentier
-Ivan
On Nov 12, 2014, at 2:20 PM, Emmanuel Charpentier emanuel.c...@gmail.com
javascript: wrote:
A bit later :
Same problem with 6.4rc2. Hints for debugging welcome...
BTW : still no typeset mode possible in the new notebook, as far as I can
tell. I
Why 0.04 ? Th notebook says :
S=(5^( x -1) == (0.04)^(2*x)).subs({0.04:1/25}).log().solve(x) ; S
[x == log(5)/(2*log(25) + log(5))]
bool(S[0].rhs()==1/5)
True
(The last step is easily done by mental computation ; this is only a
check.).
HTH,
--
Emmanuel Charpentier
Le dimanche 16 novembre
,
--
Emmanuel Charpentier
On Sunday, November 16, 2014 12:54:20 PM UTC-6, RRogers wrote:
Apparently the default solver doesn't do logarithms.
For the default try:
solve(log(5^( x -1)) == log((0.04)^(2*x)), x)
[x == 8104022*log(5)/(8104022*log(5) + 52171681)]
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Le mardi 18 novembre 2014 17:10:42 UTC+1, Chris Seberino a écrit :
Emmanuel
Any way to make Sage act like it can't find the solution (emit question
back to user) INSTEAD of emitting the empty set?
I can't find the solution and There is no solution are NOT the same
thing?
Indeed. But
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