Changes between Version 33 and Version 42 of Ticket #5457


Ignore:
Timestamp:
08/04/12 22:24:55 (8 years ago)
Author:
nthiery
Comment:

Legend:

Unmodified
Added
Removed
Modified
  • Ticket #5457

    • Property Status changed from needs_work to positive_review
    • Property Reviewers changed from Dan Bump, Franco Saliola to Dan Bump, Nicolas M. Thiery
  • Ticket #5457 – Description

    v33 v42  
    11This patch restructures the implementation of symmetric functions in sage
    22
    3 The new implementation makes use of multiple realizations and the category
    4 framework. The new access to symmetric functions is via
     3The new implementation makes use of multiple realizations and the category framework. The new access to symmetric functions is via
     4
    55{{{
    66sage: Sym = SymmetricFunctions(QQ)
    77}}}
    8 
    98Further new features that are implemented:
    109
    11 - The ring of symmetric functions is now endowed with a Hopf algebra structure.
    12   The coproduct and antipode are implemented (which were missing before).
     10 * The ring of symmetric functions is now endowed with a Hopf algebra structure. The coproduct and antipode are implemented (which were missing before).
    1311
    14 - A tutorial on how to use symmetric functions in sage is included at the
    15   beginning of sf.py which is also accessible via
     12 * A tutorial on how to use symmetric functions in sage is included at the beginning of sf.py which is also accessible via
    1613{{{
    1714sage: SymmetricFunctions??
    1815}}}
    1916
    20 - Symmetric functions should now work a lot better with respect to
    21   specializing parameters like `q` and `t` for Hall-Littlewood, Jack
    22   and Macdonald symmetric functions. Certain functionalities before
    23   this change were broken or not possible.
     17 * Symmetric functions should now work a lot better with respect to  specializing parameters like `q` and `t` for Hall-Littlewood, Jack and Macdonald symmetric functions. Certain functionalities before this change were broken or not possible.
    2418
    25 - Documentation was added to LLT polynomials (which had very sparse documentation
    26   previously).
     19 * Documentation was added to LLT polynomials (which had very sparse documentation previously).
    2720
    28 - The `k`-bounded subspace of the ring of symmetric function was implemented.
    29   The `k`-Schur functions now live in the `k`-bounded subspace rather than
    30   in the ring of symmetric functions as before.
     21 * The `k`-bounded subspace of the ring of symmetric function was implemented. The `k`-Schur functions now live in the `k`-bounded subspace rather than in the ring of symmetric functions as before.
    3122
    32 This patch gained tremendously by the tutorial on symmetric functions written
    33 by Jason Bandlow and Nicolas Thiery, a draft on the `k`-bounded subspace by
    34 Jason Bandlow, and code multiple realizations written by Franco Saliola.
     23This patch gained tremendously by the tutorial on symmetric functions written by Jason Bandlow, a draft on the `k`-bounded subspace by Jason Bandlow, and code multiple realizations written by Franco Saliola.
    3524
    3625See also http://groups.google.com/group/sage-devel/msg/a49f3288fca1b75c
    3726
    3827Apply
    39   * [attachment:trac_5457-symmetric_functions-mz.patch]
     28
     29 * [attachment:trac_5457-symmetric_functions-mz.patch]