• openAccess   ItÔ's Theorem on Groups with two class sizes revisited 

      Alemany, Elena; Beltrán, Antonio; Felipe, Maria José Australian Mathematical Publishing Association (2012-06)
      LetG be a finite p-solvable group. We prove that ifG has exactly two conjugacy class sizes of p 0 -elements of prime power order, say 1 and m, then m = p aq b , for two distinct primes p and q, and G either has ...
    • closedAccess   Restrictions on maximal invariant subgroups implying solvability of finite groups 

      Beltrán, Antonio; shao, Changguo Springer Verlag (2018)
      Suppose that G and A are finite groups such that A acts coprimely on G via automorphisms. It is interesting to investigate the structure and properties of G when we impose some restrictions on its maximal A-invariant ...