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Équations d’évolution semi-linéaires du second ordre dans $$L^ 1$$. (French) Zbl 0489.35010

##### MSC:
 35B35 Stability in context of PDEs 35G25 Initial value problems for nonlinear higher-order PDEs 47H05 Monotone operators and generalizations 35D99 Generalized solutions to partial differential equations 47D03 Groups and semigroups of linear operators 47H06 Nonlinear accretive operators, dissipative operators, etc.