My contributions to the GAP Library

• Constructors for the Suzuki groups Sz( q ) as
  • matrix groups and as
  • permutation groups, permutation-isomorphic to the action of Sz( q ) on Tits' ovoid.
  Since version 4.2.
• Functions and methods for the efficient computation of class numbers of
  • GL( n, q ),
  • the groups isogeneous to SL( n, q ),
  • PSL( n, q ),
  • GU( n, q ),
  • the groups isogeneous to SU( n, q ), and
  • PSU( n, q ).
  Since version 4.3.
• Constructors for
  • GL( n, Z/mZ ) and
  • SL( n, Z/mZ ).
  Since version 4.3.
• Functions for computing
  • continued fraction expansions and
  • continued fraction approximations
  of real roots of polynomials with integer coefficients.
  Since version 4.4.5.
• A method for computing structure descriptions for finite groups.
  Since version 4.4.5.
• A function for computing partial factorizations of integers, which permits the user to specify the amount of work he wants to invest in finding factors.
  Since version 4.4.6.