Diff for "days40_projects"

Differences between revisions 18 and 24 (spanning 6 versions)

Sage Days 40 Coding Sprint Projects

For the main Sage Days 40 wiki page go here.

Below is a list of proposed projects.

Arithmetic dynamics & symmetric functions

Ben Hutz

Grothendieck polynomials / ...

Kaisa / Nicolas; checking out with Viviane's code Mark Shimozono, Jessica Striker

Alternating sign matrices

Jessica Striker

Symmetric functions and Hopf algebras

Refactoring and extensions to symmetric functions / KSchur

Anne Schilling, Mike Zabrocki, Dorota

Refactoring and extensions to Hopf algebras

Anne Schilling, Mike Zabrocki, John, Franco

Graded Algebras

System Message: WARNING/2 (<string>, line 46)

Title underline too short.

Graded Algebras
--------------

Franco, John

Hopf algebras on graphs

Jeremy

NCSF/QSYM

Chris, Mike, Holly, Dorota, Franco, Nicolas?

Partition algebras and their reps

George

Quiver representations

Gregg Musiker, Peter Webb, Franco Saliola, Charles Paquette, Alex Fink, Julie, Al Garver, Emily Gunawan

User stories: [[attachment:quiver_representations.sage]]

Clusters algebras from surfaces

Gregg Musiker, Al Garver, Weiwen Gu, Emily Gunawan

Combinatorics

Graphs

Status as of Wednesday: Jeremy wrote some code to contract edges, check whether an edge is a cut-edge, and compute the Tutte polynomial. Lauren and Matt are beta-testing it. (It also needs commenting, examples, etc.)

Could you please poset the trac ticket number here? I am very interested to see your work (Anne).

Jeremy L. Martin, Anne Schilling, Tom, Lauren

Tutte Polynomial

Kevin, Thomas

Review of what's missing from Stembridge's packages

Alex, Drew, Thomas, Kevin

Posets & Simplicial complexes

Demo including facade posets: Kim Vic

Jessica Striker, Jeremy, John^2, Charles?, Kevin, Thomas, Alex Csar?

Wish List:

is_modular - Alex Csar
is_atomic
is_semimodular - Alex Csar
adding functionality to poset elements
iterate over lattices
zeta, order, characteristic polynomials
more examples of posets * Young diagrams - Kevin * Semistandard tableaux - Jessica/Julie * interval posets
graph_editor
disjoint union, ordinal sum, product
make dual poset function work properly for lattices (it seems to break the join)

Simplicial Complexes:

Shellability

G-posets - homology modules

H_*(-, R), H^*(-, R) when R is neither Z nor a field

cup products trac #6102

cohomology operations

how to represent (co-)homology classes? trac #6100

links (already done)

stars

Cohen-Macalaulay (trac #11523, needs review)

Fundamental Group (should not be too hard, using the code from trac #12339)

is_shifted

is_pseudo-manifold (trac #13226, needs review)

triangulate complex projective space (research problem; see mathoverflow)

chain complexes:

fix bug for map induced by map of simplicial complexes: see trac #13220, needs review, should be easy to review.
induced map on homology (high priority) trac #6101
mapping cone
tensor product
Tot of a bicomplex
filtered chain complexes and the associated spectral sequence?

Topological structures & categories & their reps

Peter Webb, John

Coxeter groups, Hecke algebras, Crystals, ...

Crystals

(trac #12251, positive review)

Anne Schilling, Mark Shimozono, Julie, Dan Bump, Ben Brubaker, Arthur Lubovsky

Extended Affine hecke algebras / weyl groups

Non symmetric Macdonald polynomials & friends in general types

Mark, Nicolas, Anne, Dan, Ben, Daniel

Integration of (affine) symmetric group and Coxeter groups

Alex Csar, Tom Denton, Holly

Complex reflexion groups

Alex Miller

Schubert Calculus

Mark, Alex, Nicolas, Kaisa, Yasuhide, Tom

Statistics on permutations

Kim2

Matroids

Jeremy, Vic

I learned that there is a matroid project well underway already: see trac #7477 and/or the Google group sage-matroid. -- Jeremy

Sage Documentation

John

Sagetex

Nicolas, Dan

Misc

Get my patches into Sage

Nicolas, Franco, Dan, Gregg

Anne (trac #12251, positive review), (trac #13224, positive review) (trac #13222, positive review)

Interface to Gfan and version update

Marshall Hampton

-  ⇤ ← Revision 18 as of 2012-07-11 18:28:37 → 
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+   ← Revision 24 as of 2012-07-11 20:30:44 → ⇥
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-Deletions are marked like this.
+Additions are marked like this.
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-Refactoring and extensions to symmetric functions / KSchur
==========================================================

Anne Schilling
Mike Zabrocki
Dorota
-Line 27:
+Line 21:
-Mark
+Mark Shimozono,
-Line 35:
+Line 29:
+Symmetric functions and Hopf algebras
=====================================

Refactoring and extensions to symmetric functions / KSchur
----------------------------------------------------------

Anne Schilling,
Mike Zabrocki,
Dorota
-Line 36:
+Line 40:
-===========================================

Anne Schilling
Mike Zabrocki
+-------------------------------------------

Anne Schilling,
Mike Zabrocki,
John,
Franco

Graded Algebras
--------------

Franco,
-Line 41:
+Line 52:
-Franco
-Line 48:
+Line 57:
-Crystals
========

Anne Schilling
Mark
Julie
Dan Ben
Arthur

Get people in Sage
==================

Dan
Nicolas
Gregg
Franco
+NCSF/QSYM
---------

Chris,
Mike,
Holly,
Dorota,
Franco,
Nicolas?

Partition algebras and their reps
---------------------------------

George
-Line 68:
+Line 75:
-Gregg
Peter Webb
Franco Saliola
Charles Paquette
Alex Fink
Julie
Al Garver
+Gregg Musiker,
Peter Webb,
Franco Saliola,
Charles Paquette,
Alex Fink,
Julie,
Al Garver,
-Line 76:
+Line 83:
+User stories: [[attachment:quiver_representations.sage]]
-Line 80:
+Line 89:
-Gregg
Al Garver
Weiwen Gu
+Gregg Musiker,
Al Garver,
Weiwen Gu,
-Line 85:
+Line 94:
+Combinatorics
=============
-Line 86:
+Line 98:
-======
+------
-Line 94:
+Line 106:
-  Jeremy L. Martin
  Anne Schilling
  Tom
+Could you please poset the trac ticket number here? I am very
interested to see your work (Anne).

  Jeremy L. Martin,
  Anne Schilling,
  Tom,
-Line 102:
+Line 116:
-Kevin
+Kevin,
-Line 105:
+Line 119:
+Review of what's missing from Stembridge's packages
---------------------------------------------------

Alex, Drew, Thomas, Kevin
-Line 106:
+Line 125:
-=============================
+-----------------------------
-Line 111:
+Line 130:
-Jessica Striker
Jeremy
John^2
Charles?
Kevin
Thomas
+Jessica Striker,
Jeremy,
John^2,
Charles?,
Kevin,
Thomas,
-Line 120:
+Line 139:
-Wish List
=========
Posets:
-------

is_modular - Alex Csar

is_atomic

is_semimodular - Alex Csar

adding functionality to poset elements

iterate over lattices

zeta, order, characteristic polynomials

more examples of posets

* Young diagrams - Kevin
* Semistandard tableaux - Jessica/Julie

graph_editor

disjoint union

ordinal sum

product

interval posets

make dual poset function work properly for lattices (it seems to break the join)
+Wish List:

- is_modular - Alex Csar
- is_atomic
- is_semimodular - Alex Csar
- adding functionality to poset elements
- iterate over lattices
- zeta, order, characteristic polynomials
- more examples of posets
  * Young diagrams - Kevin
  * Semistandard tableaux - Jessica/Julie
  * interval posets
- graph_editor
- disjoint union, ordinal sum, product
- make dual poset function work properly for lattices (it seems to break the join)
-Line 163:
+Line 164:
-cup products
+cup products `trac #6102 <http://trac.sagemath.org/sage_trac/ticket/6102>`_
-Line 167:
+Line 168:
-how to represent (co-)homology classes?
+how to represent (co-)homology classes? `trac #6100 <http://trac.sagemath.org/sage_trac/ticket/6100>`_
-Line 173:
+Line 174:
-Cohen-Macalaulay (http://trac.sagemath.org/sage_trac/ticket/11523)

Fundamental Group
+Cohen-Macalaulay (`trac #11523 <http://trac.sagemath.org/sage_trac/ticket/11523>`_, needs review)

Fundamental Group (should not be too hard, using the code from `trac #12339 <http://trac.sagemath.org/sage_trac/ticket/12339>`_)
-Line 179:
+Line 180:
-is_pseudo-manifold (http://trac.sagemath.org/sage_trac/ticket/13226 -- needs review)

triangulate complex projective space (research problem; see also http://mathoverflow.net/questions/20664/why-is-complex-projective-space-triangulable)
+is_pseudo-manifold (`trac #13226 <http://trac.sagemath.org/sage_trac/ticket/13226>`_, needs review)

triangulate complex projective space (research problem; see `mathoverflow <http://mathoverflow.net/questions/20664/why-is-complex-projective-space-triangulable>`_)
-Line 185:
+Line 186:
+- fix bug for map induced by map of simplicial complexes: see `trac #13220 <http://trac.sagemath.org/sage_trac/ticket/13220>`_, needs review, should be easy to review.
- induced map on homology (high priority) `trac #6101 <http://trac.sagemath.org/sage_trac/ticket/6101>`_
-Line 193:
+Line 196:
-Peter webb
+Peter Webb,
-Line 196:
+Line 199:
+Coxeter groups, Hecke algebras, Crystals, ...
=============================================

Crystals
--------

(`trac #12251 <http://trac.sagemath.org/sage_trac/ticket/12251>`_, positive review)

Anne Schilling,
Mark Shimozono,
Julie,
Dan Bump, Ben Brubaker,
Arthur Lubovsky

Extended Affine hecke algebras / weyl groups
--------------------------------------------

Non symmetric Macdonald polynomials & friends in general types

Mark, Nicolas, Anne, Dan, Ben, Daniel

Integration of (affine) symmetric group and Coxeter groups
----------------------------------------------------------

Alex Csar, Tom Denton, Holly

Complex reflexion groups
------------------------

Alex Miller

Schubert Calculus
=================

Mark, Alex, Nicolas, Kaisa, Yasuhide, Tom

Statistics on permutations
--------------------------

Kim2

Matroids
--------

Jeremy, Vic

I learned that there is a matroid project well underway already: see `trac #7477 <http://trac.sagemath.org/sage_trac/ticket/7477>`_ and/or the Google group `sage-matroid <https://groups.google.com/group/sage-matroid>`_. -- Jeremy
-Line 201:
+Line 251:
-Graded Algebras
===============

Franco
John

Partition algebras and their reps
=================================

George
+Sagetex
-------

Nicolas,
Dan

Misc
====
-Line 215:
+Line 261:
-========================

Nicolas
Franco
Anne
Dan
Gregg
...


Review of what's missing from Stembridge's packages
===================================================

Alex
Drew
Thomas
Kevin


Extended Affine hecke algebras / weyl groups
============================================

Non symmetric Macdonald polynomials & friends in general types

Mark
Nicolas
Anne
Dan
Ben
Daniel

Sagetex
=======

Nicolas
Dan

Schubert Calculus
=================

Mark
Alex
Nicolas
Kaisa
Yasuhide
Tom


Integration of (affine) symmetric group and Coxeter groups
==========================================================

Alex Csar
Tom Denton
Holly

NCSF/QSYM
=========

Chris
Mike
Holly
Dorota
Franco
Nicolas?

Statistics on permutations
==========================

Kim2
+------------------------

Nicolas, Franco, Dan, Gregg

Anne (`trac #12251 <http://trac.sagemath.org/sage_trac/ticket/12251>`_, positive review),
(`trac #13224 <http://trac.sagemath.org/sage_trac/ticket/13224>`_, positive review)
(`trac #13222 <http://trac.sagemath.org/sage_trac/ticket/13222>`_, positive review)
-Line 291:
+Line 274:
-Complex reflexion groups
========================

Alex Miller

Matroids
========

Jeremy
Vic

I learned that there is a matroid project well underway already: see [[http://trac.sagemath.org/sage_trac/ticket/7477|the trac ticket]] and/or [[https://groups.google.com/group/sage-matroid|the Google group]]. -- Jeremy