On page 29 equations 2.1.20 and 2.1.21 of Gravitation and Cosmology by S. Weinberg he gives these expresions for matrix componentes:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\Lambda_j^0=\gamma v_j[/tex]

My question is: shouldn't there be a minus sign on left side of the equation?

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# Confusion with Lorentz boost

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