[[Image(https://secure.gravatar.com/avatar/c7d341e2b002754f2b21fbab3a3fd
072?s=80&d=identicon, right, margin=5)]] Erik Bray
([https://gitlab.com/embray @embray]) opened a merge request at
sagemath/sage!1: [[BR]][[BR]]
{{{
#!markdown
We don't need this special case for Cygwin anymore. openblas and atlas
packages should work without special-casing use of the netlib BLAS from
Cygwin.
}}}
[[BR]][[BR]][[BR]][[BR]][[BR]]

URL: https://trac.sagemath.org/26353
Reported by: galois
Ticket author(s): Erik Bray
Reviewer(s): Travis Scrimshaw

The Hopf algebra `WordQuasiSymmetricFunctions`, despite it's name, is
indexed internally as ordered set partitions. This ticket aims to allow
the user to also use packed words as input.

URL: https://trac.sagemath.org/25913
Reported by: alauve
Ticket author(s): Aaron Lauve
Reviewer(s): Travis Scrimshaw

The current implementation of Lie subalgebras confuses two things: the
ordering of the basis of the ambient algebra and the ordering of the
indices of the ambient algebra. If both orderings agree, then everything
works fine:
{{{
sage: L.<a,b,c> = LieAlgebra(QQ, abelian=True)
sage: I = L.ideal([a+b,a+c])
sage: I.basis()
Family (a + b, a + c)
sage: Q = L.quotient(I)
sage: Q.basis()
Finite family {'a': a}
}}}
But if there is a mismatch in the ordering, then the output is wrong:
{{{
sage: L.<c,b,a> = LieAlgebra(QQ, abelian=True)
sage: I2 = L.ideal([a+b,a+c])
sage: I2.basis()
Family (-c + b, c + a)
sage: Q = L.quotient(I2)
sage: Q.basis()
Finite family {'b': b, 'a': a}
}}}
The difference is
{{{
sage: [I.lift(X).leading_support() for X in I.basis()]
['b', 'c']
sage: [I2.lift(X).leading_support() for X in I2.basis()]
['c', 'c']
}}}
That is, the behavior in the latter case is different to what is
described in the doc. The indices which are not leading supports of `I2`
do not span a complementary subspace, but instead something bigger.

The issue is that currently the computation in `basis` takes its pivot
elements based on the ordering of the ambient basis, whereas quotients
and reduction assume they can work with `leading_support`, i.e. the
ordering of the indices.

URL: https://trac.sagemath.org/26352
Reported by: gh-ehaka
Ticket author(s): Eero Hakavuori
Reviewer(s): Travis Scrimshaw

so that their L-function will work in #26098

URL: https://trac.sagemath.org/26232
Reported by: chapoton
Ticket author(s): Frédéric Chapoton
Reviewer(s): John Cremona, Travis Scrimshaw

This is part of the meta-ticket #22982.

The goal of the present ticket is to add code for computing finite and
infinite maximal orders and ideals thereof.

The central engine for computing maximal orders is the Leonard-
Pellikaan-Singh-Swanson algorithm implemented in Singular. Most
algorithms for computing with ideals are from Cohen's book  A Course in
Computational Algebraic Number Theory.

URL: https://trac.sagemath.org/25435
Reported by: klee
Ticket author(s): Kwankyu Lee
Reviewer(s): Travis Scrimshaw

We are implementing p-adic n-th roots as a p-adic Sage Days project

URL: https://trac.sagemath.org/12567
Reported by: dequan
Ticket author(s): Xavier Caruso
Reviewer(s): David Roe

This adds a reference to the polymake website and citations to polymake
publications to the `sage.interfaces.polymake` documentation.

URL: https://trac.sagemath.org/26350
Reported by: mkoeppe
Ticket author(s): Matthias Koeppe
Reviewer(s): Travis Scrimshaw

openblas and atlas packages should work without special-casing
use of the netlib BLAS from Cygwin

Fix some doctests in `src/doc`. There is a lot more work to do there.

URL: https://trac.sagemath.org/26346
Reported by: jhpalmieri
Ticket author(s): John Palmieri
Reviewer(s): Travis Scrimshaw

With ffmpeg and imagemagick installed, the command:

{{{
sage -tp --long --optional=sage,optional,external
src/sage/plot/animate.py src/sage/combinat/words/paths.py
}}}

gives:

{{{
sage -t --long src/sage/plot/animate.py
**********************************************************************
File "src/sage/plot/animate.py", line 879, in
sage.plot.animate.Animation.?
Failed example:
    a.ffmpeg(output_format='gif',delay=30,iterations=5)     # optional
-- ffmpeg
Expected:
    doctest:...: DeprecationWarning: use tmp_filename instead
    See http://trac.sagemath.org/17234 for details.
Got:
    <BLANKLINE>
**********************************************************************
1 item had failures:
   1 of  15 in sage.plot.animate.Animation.?
    5 tests skipped
    [236 tests, 1 failure, 147.88 s]

sage -t --long src/sage/combinat/words/paths.py
**********************************************************************
File "src/sage/combinat/words/paths.py", line 1611, in
sage.combinat.words.paths.FiniteWordPath_2d.animate
Failed example:
    a.gif(delay=35, iterations=3)    # optional -- ImageMagick
Expected:
    doctest:...: DeprecationWarning: use tmp_filename instead
    See http://trac.sagemath.org/17234 for details.
Got:
    <BLANKLINE>
**********************************************************************
1 item had failures:
   1 of  19 in sage.combinat.words.paths.FiniteWordPath_2d.animate
    1 test skipped
    [523 tests, 1 failure, 106.69 s]
}}}

URL: https://trac.sagemath.org/26347
Reported by: slabbe
Ticket author(s): Sébastien Labbé
Reviewer(s): Travis Scrimshaw

Maximum recursion depth can be reached when applying the `spqr_tree`
method on large graphs. We improve the code by avoiding recursive calls.

This is a follow up to #25598.

URL: https://trac.sagemath.org/26342
Reported by: dcoudert
Ticket author(s): David Coudert
Reviewer(s): Travis Scrimshaw

IIRC I've had this problem for a while but never made a report of it.

{{{
[ecl-16.1.2.p5] gcc
-DECLDIR="\"/home/embray/src/sagemath/sage/local/lib/ecl-16.1.2\"" -I. -
I/home/embray/src/sagemath/sage/local/var/tmp/sage/build/ecl-16.1.2.p5/s
rc/build -I/home/embray/src/sagemath/sage/local/var/tmp/sage/build/ecl-1
6.1.2.p5/src/src/c -I../ecl/gc -DECL_API -DECL_NO_LEGACY
-I/home/embray/src/sagemath/sage/local/include  -g -O0   -Dcygwin -c -o
ffi/backtrace.o ffi/backtrace.o.c
[ecl-16.1.2.p5] /home/embray/src/sagemath/sage/local/var/tmp/sage/build/
ecl-16.1.2.p5/src/src/c/ffi/backtrace.d: In function
'backtrace_symbols':
[ecl-16.1.2.p5] /home/embray/src/sagemath/sage/local/var/tmp/sage/build/
ecl-16.1.2.p5/src/src/c/ffi/backtrace.d:84:9: error: unknown type name
'Dl_info'
[ecl-16.1.2.p5]          Dl_info data[1];
[ecl-16.1.2.p5]          ^~~~~~~
[ecl-16.1.2.p5] /home/embray/src/sagemath/sage/local/var/tmp/sage/build/
ecl-16.1.2.p5/src/src/c/ffi/backtrace.d:88:21: warning: implicit
declaration of function 'dladdr' [-Wimplicit-function-declaration]
[ecl-16.1.2.p5]                  if (dladdr(buffer[i], data)) {
[ecl-16.1.2.p5]                      ^~~~~~
[ecl-16.1.2.p5] /home/embray/src/sagemath/sage/local/var/tmp/sage/build/
ecl-16.1.2.p5/src/src/c/ffi/backtrace.d:89:42: error: request for member
'dli_sname' in something not a structure or union
[ecl-16.1.2.p5]                          strings[i] = data->dli_sname;
[ecl-16.1.2.p5]                                           ^~
[ecl-16.1.2.p5] make[5]: *** [Makefile:86: ffi/backtrace.o] Error 1
}}}

It works if I run `SAGE_DEBUG=no make ecl`.

URL: https://trac.sagemath.org/25057
Reported by: embray
Ticket author(s): Erik Bray
Reviewer(s): Travis Scrimshaw

{{{
sage: A = matrix(GF(2), [[1, 0], [0, 1]])
sage: A.set_immutable()
sage: loads(dumps(A)).is_immutable()
False
}}}

from `explain_pickle(dumps(A))` it looks like the pickling routine for
`sage.matrix.matrix_mod2_dense` is just a little too naive. For several
other base rings immutability is preserved.

Reported on

https://ask.sagemath.org/question/40756/making-a-dictionary-of-matrices-
and-save-the-session/

URL: https://trac.sagemath.org/24589
Reported by: nbruin
Ticket author(s): Travis Scrimshaw
Reviewer(s): Nils Bruin