Let G be a finite solvable group
of odd order. Suppose p is a prime, S is a Sylow p-subgroup of G, and Oρ′(G) = 1.
Let J(S) be the Thompson subgroup of S. Then, by a result of the second author
(Lemma 6), Z(J(S)) ≈ G.
The object of this paper is to generalize the above result by replacing the prime p
by a set of primes π.