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Singular solutions of the equation (d’Alembert operator) \(\phi+(m^ 2/2)\exp \phi=0\) and dynamics of singularities. (English) Zbl 0453.35058

MSC:
35L67 Shocks and singularities for hyperbolic equations
35L70 Second-order nonlinear hyperbolic equations
35A20 Analyticity in context of PDEs
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