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In a series of papers published in the course of his dissertation work in themid 1950's, Andrzej Trautman drew upon the slow motion approximation developedby his advisor Infeld, the general covariance based strong conservation lawsenunciated by Bergmann and Goldberg, the Riemann tensor attributes explored byGoldberg and related geodesic deviation exploited by Pirani, the permissiblemetric discontinuities identified by Lichnerowicz, O'Brien and Synge, andfinally Petrov's classification of vacuum spacetimes. With several significantadditions he produced a comprehensive overview of the state of research inequations of motion and gravitational waves that was presented in a widelycited series of lectures at King's College, London, in 1958. Fundamental newcontributions were the formulation of boundary conditions representing outgoinggravitational radiation the deduction of its Petrov type, a covariantexpression for null wave fronts, and a derivation of the correct mass lossformula due to radiation emission. Ivor Robinson had already in 1956 developeda bi-vector based technique that had resulted in his rediscovery of exact planegravitational wave solutions of Einstein's equations. He was the first tocharacterize shear-free null geodesic congruences. He and Trautman met inLondon in 1958, and there resulted a long-term collaboration whose initialfruits were the Robinson-Trautman metric, examples of which were exactspherical gravitational waves.

A contextual analysis of the early work of Andrzej Trautman and Ivor Robinson on equations of motion and gravitational radiation