Letter | Published:

The Time-Triangle and Time-Triad in Special Relativity

Nature volume 110, pages 698699 (25 November 1922) | Download Citation



Dr. ROBB directs attention in NATURE of October 28, p. 572, to the fact that there is much confusion of thought with regard to the stationary value of the integral σdσ in the special theory of relativity. When the path is purely temporal, as Dr. Robb was the first to point out, the integral is an absolute maximum, not a minimum. Prof. Eddington has also directed attention to this truth. The following view may be of interest. I give mainly the results, as the precise mathematical proof would occupy too much both of space and time.

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  1. Trinity College, Dublin, October 31.

    • R. A. P. ROGERS


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