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GAP 4.3 Bugfix 2

Errors listed in bold may cause the system to return a wrong result without issuing a warning, errors in italics can cause a system crash. Other errors typically will lead to an error message and may cause the abortion of a run but will not cause wrong results.

  1. A segmentation fault when appending to a length 0 compressed vector over GF2.
  2. An error in the computation of inverses in quaternion algebras with non-standard parameters.
  3. The result of 'ProjectiveSymplecticGroup(n,q);'.
  4. `GeneratorOfCyclicGroup' for a trivial pc group.
  5. A problem in backtrack routines using `Suborbits' if the group has fixed points in the range [1..max(Omega)].
  6. A problem with `CharacterTableDirectProduct' if exactly one argument is a Brauer table.
  7. Problems with `IntScalarProduct' and `NonnegIntScalarProducts' if the third argument is not a plain list (this situation does not occur in GAP library functions).
  8. A Problem with GQuotient
  9. A problem with the linear algebra methods for Lie algebra cohomology.
  10. A Problem with requesting transitive groups of degree including 1
  11. A Problem with inverting lists of compressed vectors over fields of order greater than 2.
  12. An error in computing whether an element is in a Green's D equivalence class or not.
  13. A missing method for `MovedPoints(perm)'
  14. The method IsGreensLessThanOrEqual should work for Green's D classes for finite groups.
  15. The method GroupHClassOfGreensDClass was not implemented and is required for the Rees Matrix methods.
  16. The methods AssociatedReesMatrixSemigroupOfDClass, IsZeroSimpleSemigroup, IsomorphismReesMatrixSemigroup, and SandwichMatrixOfReesZeroMatrixSemigroup all create Greens classes using obsolete methods which for some semigroups leads to infinite recursion or causes GAP to stop with an error message.
  17. A problem with `CentralizerModulo' for permutation groups.
  18. A wrong name for PGL(2,49) in the primitive groups library of degree 50
  19. Missing `Representative' methods for certain trivial groups and trivial spaces.
  20. A missing setting of `IndicesNormalSteps'