Full paper in PDF:
$%L. de Teresa, Exact controllability of the radial solutions of the semilinear wave equation in R³, Rev. Mat. Complut. 11 (1998), no. 1, 221–245.%$

The exact internal controllability of the radial solutions of a semilinear heat equation in is proved. The result applies for nonlinearities that are of an order smaller than at infinity for . The method of the proof combines HUM and a fixed point technique.

1991 Mathematics Subject Classification: 93B05, 35L05, 35B37.