'UnionBlist' etc. are defined in GAP 3.2. But 'UniteBlist' etc. are
usually better (because they don't allocate new objects).
Thanks, Martin.
-- .- .-. - .. -. .-.. --- ...- . ... .- -. -. .. -.- .- Martin Sch"onert, Martin.Schoenert@Math.RWTH-Aachen.DE, +49 241 804551 Lehrstuhl D f"ur Mathematik, Templergraben 64, RWTH, D 51 Aachen, Germany