%0 Journal Article
%T Note on scale invariance and self-similar evolution in (3+1)-dimensional signum-Gordon model
%A H. Arodz
%A J. Karkowski
%A Z. Swierczynski
%J Physics
%D 2012
%I arXiv
%X Several classes of self-similar, spherically symmetric solutions of relativistic wave equation with nonlinear term of the form sign(\phi) are presented. They are constructed from cubic polynomials in the scale invariant variable t/r. One class of solutions describes a process of wiping out the initial field, another an accumulation of field energy in a finite and growing region of space.
%U http://arxiv.org/abs/1201.2279v1