It is shown that for a wide class of nonlinear wave equations there exist no stable time‐independent solutions of finite energy. The possibility is considered whether elementary particles might be osc...
W. Ma, and X. Geng. (2001)cite arxiv:nlin/0107071Comment: 11 pages, to appear in CRM Proceedings of AARMS-CRM Workshop on B"acklund & Darboux Transformations (1999).