Yacop/Sage integration

= PAGE NOT FINISHED YET - BE PATIENT PLEASE =

Yacop stands for "Yet Another Cohomology Program". It's a package of routines that allow to compute and investigate Steenrod algebra resolutions. The following functions are currently available:

Computatation of a minimal resolution
Graphical user interface (includes creation of postscript charts and SQL-console)
Ext of small modules
Chain maps (includes computation of P^0 and change of algebra maps)

Not everything has been thoroughly tested, though. Here's a little TO-DO list

Framework for modules is missing
Regression test suite needs to be created

Installation instructions

Download the following Sage packages & patches

tcltk8.5.7 from http://nullhomotopie.de/tcltk8.5.7.spkg
yacop1.0 from http://nullhomotopie.de/yacop1.0.spkg
patch from http://nullhomotopie.de/11803.patch

Install TclTk and recompile pyhon

This is done via the commands

sage -f -s tcltk8.5.7.spkg
sage -f -s python-2.5.2.p9

[Python recompilation is only required because Tcl/Tk was not installed on the official sage-build machine at build time. This can probably not be necessary in the future.]

To check whether Tcl/Tk has been succesfully installed, you should try this:

ddd