Summary
In synchronous coordinates the junction conditions of gravitational fields in general relativity are studied and formulated in a theorem. A new convenient procedure was formulated and used to match Schwarzschild’s and Friedmann’s fields for negative, zero and positive curvature.
Riassunto
Si studiano e si formulano in un teorema le condizioni di giunzione, in coordinate sincrone, di campi gravitazionali nella relatività generale. È stato elaborato e usato un nuovo utile procedimento per adattare i campi di Schwarzschild e Friedmann per curvatura negativa, nulla e positiva.
Реэуме
в синхронных координатах исследуются и формулируются условия контакта гравитационных полей в обшей теории относительности. Предлагается и испольэуется новая процедура для согласования полей ъварцщильда и фридмана для отрицательной, нулевой и положительной кривиэны.
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Dandach, N.F. Matching of schwarzschild’s and friedmann’s fields in synchronous coordinates. Nuov Cim B 103, 603–610 (1989). https://doi.org/10.1007/BF02753823
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DOI: https://doi.org/10.1007/BF02753823