Hierarchical Composition and
Decomposition of Permutation Groups and Transformation
SgpDec is switching to GAP 4.5. The last SgpDec release for GAP 4.4
Therefore the development version (svn repository) works only with
the upcoming release (the beta release can be downloaded from here).
Also, a new package dependency is introduced Citrus,
replacing Monoid. These changes make the installation of SgpDec
slightly more challenging, but once GAP 4.5 is out, everything will
be back to normal.
Related papers, drafts
Simple composition examples
the Skeleton of a Transformation Semigroup
Holonomy decomposition of a small automaton (cascaded automaton,
tiling picture, original automaton):