Re: [sage-support] 6.9rc3 : Ipython notebook seems seriously out of whack.

[Emmanuel Charpentier]

I went back o the "develop" branch", fetched the last release (6.9) and 
re-made. $SAGE_ROOT/local/lib/libtinfo* is still out of the way.

The resulting system can open a sample sheet created with 6.9rc3, correctly 
solves x^2+1==0 and typesets the output if necessary.

Two bizarreries :


   - Example of typeset output (cut from Jupyter to Google groups) :

In [5]:

solve(x^2+1==0, x)

Out[5]:
[x=(−i),x=i]

 (i. e. \newcommand{\Bold}[1]{\mathbf{#1}}\left[x = \left(-i\right), x = 
i\right]). The "simple" output doesn't have the superfetatory parentheses 
around the -I solution...


   - The mathjax menu seems difficult to reach


ISTR that something analogous has been discussed recently, but can't 
retrieve it at the moment...

HTH,

--
Emmanuel Charpentier

Le dimanche 11 octobre 2015 09:53:49 UTC+2, Emmanuel Charpentier a écrit :
>
> Works for me in a new sheet. Doesn't in a sheet initially created by 
> 6.9beta1. As far as I can tell, nothing in the sheet explains this 
> behaviour...
>
> And #19374 still doesn't work for me neither in the "old" or the "new" 
> sheet).
>
> HTH,
>
> --
> Emmanuel Charpentier
>
>
> Le dimanche 11 octobre 2015 07:58:53 UTC+2, tdumont a écrit :
>>
>> Le 10/10/2015 22:32, Jeroen Demeyer a écrit : 
>> > On 2015-10-10 21:24, Emmanuel Charpentier wrote: 
>> >> In [2]: 
>> >> %display simple 
>> >> 
>> >> solve(x^2+1==0,x,to_poly_solve="force") 
>> >> Out[2]: 
>> >> 
>> >> [] 
>> >> 
>> >> 
>> >> Huh ? 
>> > Works for me... 
>> > 
>> > In any case, it would be very unlikely that a Sage command actually 
>> > gives different output in the command line and in the Jupyter notebook. 
>> > 
>>
>>  >jupyter notebook 
>> sage 6.9 rc3 
>> This works for me too. 
>> t;d. 
>>
>

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[sage-support] Re: 6.9rc3 : Ipython notebook seems seriously out of whack.

[HG]

I recompiled sage and sagemanifolds (git), if I start from a terminal 
./sage -n=ipython it works fine. I I make an icon I still got jupiter not 
running. I guess I have to indicate the path somewhere ?
I notice from few months on, that ubunty python is always sending a message 
of security which seems to pertube fonctionning. Kind of "your path can be 
attacked by people bad intentioned ..." Last year I hadn't this.
Well I wait for sage-6.9 deb as I didn't solve this problem (which is only 
anoying).
Henri

Le samedi 10 octobre 2015 21:24:51 UTC+2, Emmanuel Charpentier a écrit :
>
> I just found another nice one with 6.9rc3.
>
> Not only it has problems with $SAGE_ROOT/local/lib/libtinfo* (see here 
> ), but 
> it also spews nonsense :
> In [2]:
> %display simple
>
> solve(x^2+1==0,x,to_poly_solve="force")
> Out[2]:
>
> []
>
>
> Huh ?
>
> Command-line sage :
> sage: solve(x^2+1==0, x)
> [x == -I, x == I]
>
> Sage via emacs :
> sage: solve(x^2+1==0,x)
> [x == -I, x == I]
>
> This is nicely typeset in the emacs window, BTW...).
>
> I also checked that the sage notebook is indemn of this folly...
>
> And, BTW, I also tried Trac#19374  
> with the same result (and no typeset output, by the way !).
>
> I think this should be a blocker...
>
> For the record : this is on a tree resulting from a fresh tarball, where I 
> moved $SAGE_ROOT/local/lib/libtinfo* out of the way, which passes 
> ptestlong, and where I did git trac chechout 19374.
>  
> Any idea/opinion on how to write the ticket ?
>
> HTH,
>
> --
> Emmanuel Charpentier
>
>

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Re: [sage-support] 6.9rc3 : Ipython notebook seems seriously out of whack.

[Eric Gourgoulhon]

Le lundi 12 octobre 2015 09:33:21 UTC+2, Emmanuel Charpentier a écrit :
>
>
>
> Two bizarreries :
>
> The "simple" output doesn't have the superfetatory parentheses around the 
> -I solution...
>
>
This has nothing to do with the LaTeX rendering in the jupyter notebook: it 
results from sage command latex and is already here in the console:

sage: latex([x == -I, x == I])
\left[x = \left(-i\right), x = i\right]



>- The mathjax menu seems difficult to reach
>
>
>
Have you tried to right-click on the displayed formula ? (it works for me) 

Best wishes,

Eric.

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[sage-support] Re: Is this a bug in Polyhedron class (RDF vs AA)?

[Nathann Cohen]

Hellooo,

Is the following behavior normal:
>

Well... In the first case you work on an exact ring, and in the second case 
you compare the output of >= and > on an inexact ring.

I do not know if there is something wrong somewhere, but I do not expect 
float computations to be exact either, so I do not know...

Nathann

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[sage-support] Is this a bug in Polyhedron class (RDF vs AA)?

[jplab]

Hi everyone,

Is the following behavior normal:

sage: P = polytopes.regular_polygon(5)
sage: a_vertex = P.vertices()[0]
sage: for facet in P.Hrepresentation(): print facet.contains(a_vertex), 
facet.interior_contains(a_vertex)

True False
True True
True False
True True
True True
sage: P = polytopes.regular_polygon(5, base_ring=RDF)
sage: a_vertex = P.vertices()[0]
sage: for facet in P.Hrepresentation(): print facet.contains(a_vertex), 
facet.interior_contains(a_vertex) 
True True
True True
True True
True True
True True

Doing this containment test in RDF seems to break. I guess that there are 
many methods that depend on the containment methods that also break then?


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Re: [sage-support] Re: Is this a bug in Polyhedron class (RDF vs AA)?

[Vincent Delecroix]

On 12/10/15 12:57, Nathann Cohen wrote:

Is the following behavior normal:


Well... In the first case you work on an exact ring, and in the second case
you compare the output of >= and > on an inexact ring.

I do not know if there is something wrong somewhere, but I do not expect
float computations to be exact either, so I do not know...


Yeap. This is exactly it. You have vertices over an inexact ring and 
equations over an inexact ring. You should not expect anything beyond 
the precision of the ring. Including subtle difference between < and <=.


sage: 0.9 == 0.3 + 0.3 + 0.3
False
sage: 0.9 > 0.3 + 0.3 + 0.3
True

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