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= 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
}}}