[sage-support] Re: How use alternative authentication for notebook server?.(i.e. integrate with other web app?)..

2011-05-25 Thread Jason Grout

On 5/26/11 12:35 AM, Chris Seberino wrote:

My students authenticate themselves by signing into a classroom web
app unrelated to Sage.

Possible to integrate Sage notebook server with this classroom web app
so students
DO NOT have to authenticate a SECOND TIME with Sage login page?


It depends on what webapp you are talking about.

There is work to make the notebook work with OpenID, and there has been 
work before to make the notebook work with LDAP.  The OpenID work is 
nearly complete and will probably be merged into Sage sometime this summer.


Jason


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[sage-support] How use alternative authentication for notebook server?.(i.e. integrate with other web app?)..

2011-05-25 Thread Chris Seberino
My students authenticate themselves by signing into a classroom web
app unrelated to Sage.

Possible to integrate Sage notebook server with this classroom web app
so students
DO NOT have to authenticate a SECOND TIME with Sage login page?

Chris

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[sage-support] nitpicking on README.txt

2011-05-25 Thread Kelvin Li
Two, insignificant typos in README.txt:

Line 147: fullly (note the three L's)
Line 289-290: "GPL version 3 or later"q compatible (extraneous "q")

I'm not sure what to process is to modify this file, so that's why I'm
posting here.

-- Kelvin

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[sage-support] Re: Using sage blocks with output in Latex

2011-05-25 Thread Alexandre Blondin Massé
Actually, I was looking for what will be in the next sagetex release:
the sagecommandline environment!

Thank you for the answer and for the great package!

Alexandre

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Re: [sage-support] Legend Options in 2D Plots? Title Options in 3D plots?

2011-05-25 Thread D. S. McNeil
> 1 - On 2D plots, I have been unable to use the legend() attribute and
> the set_legend_options() attribute.

I don't think you have those methods.  I think you're using an old
version of sage (maybe <= 4.5.2?) but reading documentation from a
later version, which occasionally causes trouble.  What does version()
report?


Doug

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[sage-support] Legend Options in 2D Plots? Title Options in 3D plots?

2011-05-25 Thread Mel
I have two issues:

1 - On 2D plots, I have been unable to use the legend() attribute and
the set_legend_options() attribute.

The commands
g = plot(x)
g.legend()
give me the error "AttributeError: 'Graphics' object has no attribute
'legend'"

Also, I have been unable to label the legend when creating the plot as
is shown in the sage documentation. The command
P = plot(sin, legend_label='sin')
gives me the error "RuntimeError: Error in line(): option
'legend_label' not valid."


2 - On 3D plots, is there a way to create a legend or title? Is there
a way to add labels to the axes, or change the color of the axes?

Any suggestions are welcome. Thanks!

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[sage-support] Error: Converting from p-adics to rationals.

2011-05-25 Thread Mel
I'm having an issue with converting between p-adic and rational
numbers.

Specifically, there are certain p-adic numbers that I cannot convert
to rationals. As an example, if 1+7^3+O(7^5) is a 7-adic integer with
capped relative precision 5, I cannot convert it to a rational. I get
the error "ValueError: Rational reconstruction of 344 (mod 16807) does
not exist."

More generally, it seems that if the precision of the p-adic number is
O(p^n), and the p-adic number includes powers of p greater than n/2,
the number cannot be converted to a rational.

Any info is appreciated. Thanks!

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[sage-support] Iterating over finite extension fields.

2011-05-25 Thread D. Monarres
Hello All,

First off, I would like to say that Sage is great and all of the hard
work that the developers have put forth definitely shows.

I am writing a tutorial for using Sage in undergraduate mathematics
courses at a public 4 year university and am running into a few
issues. I would appreciate any help and if these are indeed bugs than
I wouldn't mind being pointed toward where I can go to help fix them.


So right now I am going through constructing finite fields in a couple
of different ways. One using the build in GF command with different
moduli and the other is by constructing a prime field and then
extending it using the root of a irreducible polynomial of specified
degree.  As there is not any "all irreducible polynomials of a certain
degree command in Sage" I just constructed all polynomials of that
degree and then filtered the list using the is_reducible() method.

For example, to construct all degree two polynomials over GF(5) I did

sage: F5 = GF(5)
sage: P. = PolynomialRing(F5,  'x')
sage: AP = [ a1 + a2*x + a3*x^2 for (a1,a2,a3) in F5^3  if a3 !=
F5(0) ]

then I filter like this

sage: IR = [ p for p in AP if p.is_irreducible() ]
sage: PR = [ p for p in AP if p.is_primitive() ]

Then I construct F_{5^2}

sage: F25.   = F5.extension( PR[0], 'a')


and everything works great. The problem arises when  I want to extend
this field. When I try to construct my polynomial over F25 I get an
error that F25 does not allow for iteration.

Is there a better way to construct a list of irreducible and/or
primitive polynomials in Sage? Do you think that
PolynomialQuotientRing_field can be extended to support iteration as
long as it is finite? I would be willing to make an attempt at doing
this if somebody could give me some tips as to where to begin?

Thank you all for your hard work,

David Monarres

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[sage-support] Re: Plots using R in sage notebook appear later

2011-05-25 Thread ancienthart
A good tutorial for R/sage is available at:
http://www.sagenb.org/home/pub/2232/

Joal Heagney

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