General Relativity and Gravitation

, Volume 43, Issue 1, pp 337–358

Republication of: Observations in cosmology

Open Access
Golden Oldie


This is a reprinting of a paper by Jerome Kristian and Rainer K. Sachs, first published in 1966, in which they proposed a power-series scheme for reading out various parameters of the Universe directly from observations in a model-independent way. The paper has been selected by the Editors of General Relativity and Gravitation for re-publication in the Golden Oldies series of the journal. This republication is accompanied by an editorial note written by George Ellis and by a brief biography of J. Kristian, compiled by A. Krasiński from internet sources.

Copyright information

© The Author(s) 2010

Authors and Affiliations

  1. 1.MadisonUSA
  2. 2.Department of MathematicsUniversity of CaliforniaBerkeleyUSA

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