General Matrix Groups [HB 21]

New features:

• The function Centralizer(H, K) for matrix groups H and K is now allowed, provided only that H and K have a common supergroup. (Previously K had to be a subgroup of H.)

Bug fixes:

• A bug in LineOrbits which would sometimes include the zero vector has been fixed.
• Bugs fixed in ConjugacyClasses.
• Bug in Eigenspace fixed.