Sage days 9 Student Projects

Please add your project to this list. Follow the examples that are already there.

• Mclean Edwards, Scott Zhou: BFGS Iterates. Plotting iterates, in an interactive manner, of the celebrated BFGS method for the minimization of nonconvex and convex functions. Comparison of sage, jyscript/piscript, and our own python-based solutions.

• Jakub Marecek: Toy Integer Programming Solver. A very limited integer programming solver for instances with 3 variables, but complete with several primal heuristics in use today, and visualising the workings nicely. (Java & vtkHull?)

  • Further ideas: SVG and PDF Output for JyScript. A quick hack using Apache Batik (http://xmlgraphics.apache.org/batik/). TeX and PS and PDF Output for SAGE. A quick hack using Sketch (http://www.frontiernet.net/~eugene.ressler/).

• Aurel Meyer: Symmetry groups of polytopes. Graphics to illustrate that all symmetry groups of regular polytopes are finite Coxeter groups.

• Yair Go1dberg: 3D Graphing in PiScript. Plotting 3 dimensional functions in PiScript.

• Steve Kieffer: Algebra sketches. Tools with which to produce sketches of a kind often drawn on blackboards to illustrate algebraic structures.

• Michael Lamoureux: EasyBalls. A 2D animation of colliding balls, maybe with gravity, maybe with E&M if I can get the 3D in there.

• Ryan Hoban: Hyperbolic Geometry. Using sage to draw geometric structures in the Hyperbolic plane.

• Sébastien Labbé: Combinatorics on words.

  1. Use colors and @interact of sage to study equations on words.

     • [http://wiki.sagemath.org/Days9Projects?action=AttachFile&do=get&target=Equations_on_words_with_color.sws Equations_on_words_with_color.sws] (Next version of [http://code.google.com/p/sage-words/ sage-words package] needed to run it!!)

  2. Use jyscript and jython to create a java applet to illustrate Christoffel words

     • [http://wiki.sagemath.org/Days9Projects?action=AttachFile&do=view&target=ChristoffelWord.py ChristoffelWord.py]

  3. Add gridlines to plot in sage. Franco Saliola improved *a lot* my initial patch by adding many options to make it work like in Matematica. See [http://trac.sagemath.org/sage_trac/ticket/3825 Ticket #3825]

• Arnaud Bergeron: Better adaptive plotting in Sage. At William's request, I am working on better adaptive refinement for Sage's plot() command.