y23. A recent result of major importance was obtained by Walter Feit (1930-) and John G. Thompson (Pacific Jour, of Math., 13, Part 2, 1963, 775-1029). All finite groups of odd order are solvable. The suggestion that this might be the case was made by Burnside in 1906. are solvable is part of the broader problem of determining the structure of a given group.