MinBlocks( module, B )
MinBlocks finds the smallest block containing the echelonised
basis B under the action of the G-module module.
The block system record returned has three components: the number of blocks,
a block containing the supplied basis B, and a permutation group
which describes the action of G on the blocks.
MinBlocks is called by
This function requires the package "smash" (see RequirePackage).