On the nature of finite groups
  The reality of the difficulties in investigation of finite groups are considered. It is shown that the consideration of symmetry properties of the $k$-orbits that are obtained with an action of a finite group $F=(V,\cdot)$ on Cartesian power $V^k$ gives a new view on the nature of groups and simplifies some difficult properties of groups.   Using this representation it is obtained a simple proof of the W. Feit, J.G. Thompson theorem: Solvability of groups of odd order. 
Aleksandr Golubchik