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This is a page on GAP 3, which is still available, but no longer supported. The present version is GAP 4  (See  Status of GAP 3).

GAP 3 Share Package "mop"

Action of parabolic subgroups on the Lie algebra of the unipotent radical

Share package since December 2001, communicated by Gerhard Hiss, Aachen.
This package has not yet been transferred to or replaced in GAP 4. You can use it only in GAP 3.


Ulf Jürgens and Gerhard Erich Röhrle.


Language: GAP 3
Operating system: Any
Current version: 1.0 (in the 3.4.4 distribution)


MOP is designed to compute upper bounds for the modality of the action of parabolic subgroups P on pu, the Lie algebra of the unipotent radical of P, for simple algebraic groups G over an algebraically closed field K. It is a GAP 3 share package based on the CHEVIE package.

Home Page (pointing to a postscript manual)


Contact address

Gerhard Erich Röhrle
School of Mathematics and Statistics
The University Birmingham
Birmingham, B15 2TT