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Trigonometry in Lorentzian geometry. (English) Zbl 0555.51009

This is a short introduction to the topic given in the title. Main tool is the so-called reversed Cauchy-Schwarz inequality for certain vectors in vector spaces with an indefinite metric.
Reviewer: Bernd Wegner

MSC:

51M05 Euclidean geometries (general) and generalizations
51-01 Introductory exposition (textbooks, tutorial papers, etc.) pertaining to geometry
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