#### Nonscattering solutions and blowup at infinity for the

As a matter of fact the proof of Theorem makes extensive use of the techniques developed in see also [23 24] for analogous results in the case of critical wave maps and Yang Mills equations In this respect we also mention another construction of blowup solutions for the critical wave equation by Hillairet and Raphaël [ 18 ] albeit for the higher dimensional case {mathbb{R }}^{1 4