## I. The $$u^ 5$$ Klein-Gordon equation. II. Anomalous singularities for semilinear wave equations.(English)Zbl 0473.35055

Nonlinear partial differential equations and their applications, Coll. de France Semin., Vol. I, Res. Notes Math. 53, 335-364 (1981).

### MSC:

 35L70 Second-order nonlinear hyperbolic equations 35L75 Higher-order nonlinear hyperbolic equations 35B40 Asymptotic behavior of solutions to PDEs

### Citations:

Zbl 0456.00015; Zbl 0111.091; Zbl 0228.35055