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Pure field theories and MACSYMA algorithmsA pure field theory attempts to describe physical phenomena through singularity-free solutions of field equations resulting from an action principle. The physics goes into forming the action principle and interpreting specific results. Algorithms for the intervening mathematical steps are sketched. Vacuum general relativity is a pure field theory, serving as model and providing checks for generalizations. The fields of general relativity are the 10 components of a symmetric Riemannian metric tensor; those of the Einstein-Straus generalization are the 16 components of a nonsymmetric. Algebraic properties are exploited in top level MACSYMA commands toward performing some of the algorithms of that generalization. The light cone for the theory as left by Einstein and Straus is found and simplifications of that theory are discussed.
Document ID
19770021815
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ament, W. S.
(Naval Research Lab. Washington, DC, United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1977
Publication Information
Publication: NASA. LANGLEY Res. Center Proc. of the 1977 MACSYMA Users' Conf. (NASA)
Subject Category
Computer Programming And Software
Accession Number
77N28759
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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