In a recent article, Faraoni proposed an alternative procedure to solve the Friedman–Lemaître–Robertson–Walker cosmological equations. The basic result of that paper was obtained long ago through a different approach, which seems to be little known and deserves closer attention due to its pedagogical interest. The broad importance of this method is readily recognized by examining some additional cases not considered by Faraoni. Its instructive potential for introductory courses on cosmology has been positively verified by the author in many lectures during the last decade.
Topics
Lectures
REFERENCES
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Actually, the case should be separately discussed because from (5) one has This means that the solution, is valid for all values of K. Taking the first integral as given by (7), the particular closed expansionist solution is lost.
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© 2001 American Association of Physics Teachers.
2001
American Association of Physics Teachers
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