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Copy file name to clipboardexpand all lines: CygwinPort.md
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It should be noted that some libraries were only build in static version although building a shared version should not be a problem, but just a matter of passing -no-undefined to libtool when it is invoked in link mode (adding --no-undefined to LDFLAGS might not work, nor adding -Wl,--no-undefined to C[XX]FLAGS flags, it is really libtool which must be convinced it is not an issue and it doesn't care about the previous env variables) so that libtool does not complain, this is now [#13354](https://trac.sagemath.org/ticket/13354) (see there for current status).
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Some worrying cygcheck output:
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```
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(sage-sh) jp`@`THINKPAD:~/sage-5.2$ for d in `find . -name *.dll`; do t=`cygcheck $d 2>&1|grep "not find"`; if [ -n "$t" ]; then echo $d; echo $t; fi; done
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./local/lib/R/modules/vfonts.dll
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cygcheck: track_down: could not find libR.dll
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```
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Follow-up tickets:
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* the lcalc_Lfunction is now [#13351](https://trac.sagemath.org/ticket/13351),
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* the rpy2.rinterface.rinterface is now [#13350](https://trac.sagemath.org/ticket/13350),
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* the R/modules/* errors are harmless.
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Doctest failures:
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```
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```
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Follow-up tickets:
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* sage.libs.mwrank.mwrank seems dysfunctional. Linking it to a shared version of eclib provided in [#13325](https://trac.sagemath.org/ticket/13325) solves the problem.
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### Testing Sage 5.6.rc0 on 64 bits Windows 7
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With the following Cygwin packages installed:
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```
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$ cygcheck -c
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Cygwin Package Information
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xz 5.0.2_20110517-1 OK
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zlib0 1.2.7-1 OK
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```
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+ hacks:
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* the gcc-4.7.2.p0 optional spkg (from [#13913](https://trac.sagemath.org/ticket/13913), merged) as gcc 4.6.3 is known to fail to build ECL,
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* the zlib spkg from [#13914](https://trac.sagemath.org/ticket/13914) to install shared libraries,
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* there really is a problem with singular, see [#14033](https://trac.sagemath.org/ticket/14033)
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* had to rebase once before the sage library
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* errors building libgap related files in the sage library, surely because no shared libgap is built because of libtool -no-undefined flag mess (by the way libgap spkg-install is a real mess):
build/temp.cygwin-1.7.17-i686-2.7/sage/libs/gap/util.o: In function `__pyx_f_4sage_4libs_3gap_4util_memory_usage':
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/home/jp/sage-5.7.beta1/devel/sage/sage/libs/gap/util.c:4232: undefined reference to `__imp__libGAP_StopBags'
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/home/jp/sage-5.7.beta1/devel/sage/sage/libs/gap/util.c:4241: undefined reference to `__imp__libGAP_EndBags'
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```
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* after fixing the libgap issue (see [#14038](https://trac.sagemath.org/ticket/14038)), Sage builds and starts, reissued make to build the few missing spkg (sagetex, conway_polynomials), and now its building the doc.
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* needs a rebase when building the doc, then finished successfully.
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* now running "make ptest" (expecting some failures as I did not take care of [#13960](https://trac.sagemath.org/ticket/13960) or [#9176](https://trac.sagemath.org/ticket/9176) and surely others).
[GitHub](https://github.com) refers to the popular source code hosting and issue tracking service. For convenience, there is a [mirror of Sage's repository](https://github.com/sagemath/sage) on GitHub, though it should be considered read-only, and we do not accept issues or pull requests to Sage through GitHub. However, the [SageMath organization](https://github.com/sagemath) on GitHub does host a number of other ancillary repositories related to Sage, and other Sage-related projects, including (but not limited to):
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<imgsrc="https://github.githubassets.com/images/modules/logos_page/Octocat.png"height=200,right>[GitHub](https://github.com) refers to the popular source code hosting and issue tracking service. For convenience, there is a [mirror of Sage's repository](https://github.com/sagemath/sage) on [GitHub](GitHub), though it should be considered read-only, and we do not accept issues or pull requests to Sage through [GitHub](GitHub). However, the [SageMath organization](https://github.com/sagemath) on [GitHub](GitHub) does host a number of other ancillary repositories related to Sage, and other Sage-related projects, including (but not limited to):
Some SageMath development is also happening on GitLab.
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Some [SageMath](SageMath) development is also happening on [GitLab](GitLab).
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We run a read-only [mirror of the official branches](https://gitlab.com/sagemath/sage/) , a read-only [mirror of the branches that people work on on trac](https://gitlab.com/sagemath/dev/trac/) , and a [collaborative workspace](https://gitlab.com/sagemath/dev/sage/) (contact any of the developers there if you want to get access.)
Copy file name to clipboardexpand all lines: Home.md
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```
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}}}
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You can also use backticks (```) to demarcate inline code snippets, etc. This is useful around names like `DiGraph` to avoid an automatic wikilink (DiGraph), like so: ``DiGraph``.
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SageMath makes use of many upstream projects, which have their own bug tracking pages. A selection: [Cython](https://github.com/cython/cython), [fflas-ffpack](https://github.com/linbox-team/fflas-ffpack/issues), [GAP](https://github.com/gap-system/gap/issues), [GCC](https://gcc.gnu.org/bugzilla/) ([instructions](https://gcc.gnu.org/bugs/)), [Givaro](https://github.com/linbox-team/givaro/issues), [JMol](https://sourceforge.net/p/jmol/bugs/), [LinBox](https://github.com/linbox-team/linbox/issues), [Maxima](https://sourceforge.net/p/maxima/bugs/), [Numpy](https://github.com/numpy/numpy/issues), [PARI/GP](https://pari.math.u-bordeaux.fr/Bugs/) ([instructions](https://pari.math.u-bordeaux.fr/Bugs/Reporting.html)), [Python](https://bugs.python.org/), [Singular](https://www.singular.uni-kl.de:8002/trac/).
@@ -77,7 +78,7 @@ Make sure you understand the review process, and the procedures for opening and
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When opening a ticket to make a feature request or to plan a project, you may find our [Feature request guidelines](https://wiki.sagemath.org/feature_request_guidelines) helpful.
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[[Home/ticket_badges.png]]
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After pushing a branch to a ticket, the ticket will show badges linking to results of automated tests that run on the [patchbot](patchbot) and other [tests that run on GitHub Actions](https://trac.sagemath.org/wiki/ReleaseTours/sage-9.6#Newdevelopertools).
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+xyzzy
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```
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}}}
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To avoid an automatic wikilink for non-code names like GitHub, prepend it with an exclamation mark: `GitHub`. See WikiFormatting for more information.
Copy file name to clipboardexpand all lines: PatLeSmithe.md
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[This is the Trac macro *TicketQuery* that was inherited from the migration](https://trac.sagemath.org/wiki/WikiMacros#TicketQuery-macro) called with arguments (max=15,status=needs_info
Copy file name to clipboardexpand all lines: QuantumDividedPowerAlgebra.md
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The QuantumDividedPowerAlgebra is a graded algebra over a ring R[q]. The component in degree n is the free R[q]-module with basis x^n^. The multiplication is defined on basis elements by x^r^.x^s^ = [r+s,r]_q x^r+s^ where [r+s,r]_q is the quantum binomial coefficient.
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The [QuantumDividedPowerAlgebra](QuantumDividedPowerAlgebra) is a graded algebra over a ring R[q]. The component in degree n is the free R[q]-module with basis x^n^. The multiplication is defined on basis elements by x^r^.x^s^ = [r+s,r]_q x^r+s^ where [r+s,r]_q is the quantum binomial coefficient.
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The [DividedPowerAlgebra](http://trac.sagemath.org/sage_trac/search/opensearch?q=wiki%3AQuantumDividedPowerAlgebra) is a graded algebra over a ring R. The component in degree n is the free R-module with basis x^n^. The multiplication is defined on basis elements by x^r^.x^s^ = [r+s,r]_q x^r+s^ where [r+s,r] is the binomial coefficient.
Copy file name to clipboardexpand all lines: SageCombinatChevieStatusReport.md
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* Representation theory of Coxeter/reflection groups: porting Chevie's data collections (and/or smoothly interfacing to them as a temporary measure) would definitely make sense. On the other hand algorithms for representations of general groups really belong to GAP 4. Much needs to be done to better expose such features in Sage, in particular around character tables (see [#9293](https://trac.sagemath.org/ticket/9293))!
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* Braid groups:
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```
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sage: B = BraidGroup(W)
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sage: B.from_reduced_word(1,2,3)
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```
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* Community?
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* Potential collaboration with Dehornoy
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* A notion of braid group exists for every finite complex reflection group
| Basic enumerative combinatorics | 75% | 2007-08 by Mike |
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| Decomposable objects / Species | 75% |[#10662](https://trac.sagemath.org/ticket/10662)|
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| Trees | 30% ||
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| Database access |100% ||
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| MachineIntegerListsLex | 0% | Will be easy via cython |
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| Basic abstract data structures |100% | (fast stacks, AVL, dancing links) compares to just the basic ones in MuPAD + no real way to implement some with serious speed ourselves |
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## Road map
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* Hopf algebras, Symmetric functions, and generalizations
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