Peres metric
Introduction In mathematical physics, the '''Peres metric''' is defined by the proper time:for any arbitrary function ''f''. If ''f'' is a harmonic function with respect to ''x'' and ''y'', then the corresponding Peres metric satisfies the Einstein field equations in vacuum. Such a metric is often studied in the context of gravitational waves. The metric is named for Israeli physicist Asher Peres, who first defined the metric in 1959.
See also *Introduction to the mathematics of general relativity*Stress–energy tensor*Metric tensor (general relativity)
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