Hi, everybody. I have some problem with Wald's statement shown in the picture. This is from the last paragraph in Page 178.(adsbygoogle = window.adsbygoogle || []).push({});

He claimed that there are only solutions with two of the [itex]p_{\alpha}[/itex] positive and one negative. But it's easy to find out that if two of the [itex]p_{\alpha}[/itex] are negative while the third positive, there is no contradiction.

Can you guys help me with this? Why should all the solutions have two positive [itex]p_{\alpha}[/itex] and one negative? Thank you

(The picture is from http://books.google.com/books?id=9S...ce=gbs_ge_summary_r&cad=0#v=onepage&q&f=false)

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Wald General Relativity: On the homogenous cosmology, Page 178

Loading...

Similar Threads - Wald General Relativity | Date |
---|---|

I "General Relativity" by Wald -- question | Feb 22, 2017 |

I Did Wald make a mistake here? | Jun 19, 2016 |

A Covariant derivative definition in Wald | May 6, 2016 |

Wald Chapter 10 Problem 2 | Feb 2, 2014 |

Question about theorem 2.2.1 in Wald's General Relativity | Sep 9, 2012 |

**Physics Forums - The Fusion of Science and Community**