[GAP Forum] GRAPE 4.2

Leonard Soicher l.h.soicher at qmul.ac.uk
Wed Apr 21 14:37:15 BST 2004

Dear GAP-Forum,

I am pleased to announce the release of the GRAPE 4.2 GAP Package
for computing with graphs and groups.  GRAPE 4.2 is included with the
recently released GAP 4.4, and should not be used with any previous
version of GAP.

I hope you enjoy using GRAPE 4.2. 

Regards,  Leonard Soicher

The main changes from GRAPE 4.1 to GRAPE 4.2 are:

(1) Including Steve Linton's `SmallestImageSet' function, and using
this function for faster isomorph rejection in `CompleteSubgraphs',
`CompleteSubgraphsOfGivenSize', and `PartialLinearSpaces'.

(2) Further improvements to `CompleteSubgraphs' and
`CompleteSubgraphsOfGivenSize', including functionality in the latter
which will be required by the `Design' package.

(3) All global function names are now read-only.
(4) `OrbitalGraphIntersectionMatrices' is no longer an 
alternative name for `OrbitalGraphColadjMats'.
This change is *not* backward compatible.

(5) The function `Vertices' is now an operation, so as not to
conflict with the xgap package. 

(6) The default value for GRAPE_NRANGRENS has been increased to 18.

(7) Output streams are now used in `AutGroupGraph' and

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