Google Summer of Code 2010

Important Dates

Here is the original timeline. Some highlights:

• *March 8 - 12:* application window
• *March 18:* accepted mentoring organizations announced
• *March 29 - April 9:* student application window
• ...

GSoC Sage Projects

All #numbers below refer to trac tickets. Make sure to read the notes section before you edit the list of projects below.

Notebook

The Sage notebook is an AJAX application similar to Google Documents that provides functionality for all mathematical software somewhat like Mathematica notebooks. It was written from scratch (in Javascript and Python) by the Sage development team, and has been used daily by thousands of people over the last year. It's one of the main killer features of Sage. This project is about improving the notebook. No special mathematical knowledge is required. Knowledge of Javascript, jQuery, Python, and general AJAX techniques is needed.

• Authentication backend (ldap, kerberos?)
• Improvements to interact
• Add support for making presentations
• Enhance export capabilities create methods for well designed PDF, LaTeX (with or without SageTeX) or ODF output.
• master-notebook, collection of other notebooks for a script or book.
• Permanent hyperlinks between worksheets, independent of worksheet numbering, to support multi-worksheet documents (ie books)
• enhance history and snapshot capabilities.
• concurrent editing of one single document: only altered cells are updated and "collision" warnings issued if more than one change happens with appropriate methods to solve it
• read/write permission management for groups with roles (teacher is able to read notebooks, but students are not able to read each others)
• ...

Internationalization of the notebook

This project would involve changing the Sage notebook so that the user interface language can be translated and changed on the fly. This project will require knowledge of Python, Mercurial, and basic web coding; knowing the GNU gettext utilities, Javascript, and the Jinja web templating system will be helpful. No knowledge of (human!) languages other than English is necessary.

Currently, the user interface for the Sage notebook is all in English. Several one-off translations have been done (Korean; Russian) involved going through source code and translating each string individually. The goal of the Sage project is to produce a viable alternative to Maple, Mathematica, Magma, and Matlab; having the user interface available in non-English languages would have a tremendous impact on that goal and vastly increase the number of people who can benefit from Sage.

Proper internationalization (i18n) involves wrapping each string in a function that looks up the correct translation, depending on the current language selected.

Deliverables for this project would include:

• wrapping strings in the Python, Javascript, and templating code of the Sage notebook with appropriate translation calls;
• updating the Sage notebook so that the language can be set to a default language (so that, say, a French site could have everything default to French) and can be changed on a per-user basis (so each user can choose a preferred language);
• developing a workflow for adding new translations and updating existing translations when strings change.

It would also be nice to work on support for more significant localization, perhaps using the Python Babel tools; this would include more thorough localization abilities, such as proper pluralization, thousands/decimal separators, ordinals, date and time display, and so on.

This project will not involve any actual translation, just making it possible for the Sage notebook UI to be localized. This is probably a medium-difficulty project, and will not require any specialized knowledge of mathematics or mathematical programming.

Community Tools

• Enhance publishing of Notebook documents (i.e. like on http://www.sagenb.org/pub).

  • Wiki-like platform for editing notebooks for publishing mathematical, physical, statistical and other content.
  • tagging support, listings by tags
  • efficiently exchange usage examples, tips and ideas.

Interfaces to Sage

Make it easier to call Sage from other applications.

• Sage as a C library
• libGAP

Portable C99 libm

Sage relies on a fairly complete C99 libm. In particular, it expects the "long double" and "complex" variants of most functions to be present. Not all these functions are present on Cygwin, FreeBSD or older Solaris, causing porting problems on those platforms. The objective of this task would be to either locate and port or write a libm that is sufficient to meet Sage's requirements.

One possible option would be to use glibc and only compile the libm bits. (Thought glibc is a bit dodgy on the precision side in some areas).

pynac

• optimization / better data structures (heaps?)

Development Process

• automated doctesting for tickets marked "needs review"
• setting up a buildbot with trac integration for tickets with patches (list failing doctests, ...)
• ...

Porting

• Cygwin
• FreeBSD
• Solaris?
• Improvements to the build system?

Others

Here are some other task lists:

• devel/SageTasks

• symbolics

• PolyhedraWishList

Potential Mentors

• Burcin Erocal
• Peter Jeremy (FreeBSD port, possibly libm task)
• William Stein

• DanDrake

Notes:

We should take care to define deliverables for the items below. These should be doable with less than 3 months of work.

Here is what the FAQ says for "Ideas" lists:

• An "Ideas" list should be a list of suggested student projects. This list is meant to introduce contributors to your project's needs and to provide inspiration to would-be student applicants. It is useful to classify each idea as specifically as possible, e.g. "must know Python" or "easier project; good for a student with more limited experience with C++." If your organization plans to provide an application template, you should include it on your Ideas list.

• Keep in mind that your Ideas list should be a starting point for student applications; we've heard from past mentoring organization participants that some of their best student projects are those that greatly expanded on a proposed idea or were blue-sky proposals not mentioned on the Ideas list at all.

And this is from the notes on organization selection criteria:

• 2) Do the projects on your ideas list look feasible for student developers? Is your ideas list thorough and well-organized? Your ideas list is the first place that student participants are going to look to get information on participating in GSoC, so putting a lot of effort into this list is a good thing(tm). One thing we noticed and really appreciate is how some organizations classified their ideas by easy, medium and difficult, and specifically listed the skills and background required to complete a given task. It might also be cool to expand on each idea with some places to get started research-wise (pointers to documentation or specific bugs), as well as the impact finishing a given idea will have for the organization.