# Question about the kinematic equation

by pliu123123
Tags: equation, kinematic
 P: 41 In Euclidean Space-Time, the kinematic equation is: $$s^2=g_{\mu\nu}x^{\mu}x^{\nu}$$ am i correct if i write : $$K^{\mu \nu}_{\mu \nu}=g_{\mu \nu}x^{\mu}x^{\nu}$$ where $$s^2=K^{\mu \nu}_{\mu \nu}$$? thank you very much
 Sci Advisor P: 1,250 You could, but why? You do understand that the repeated indices mean a sum over all mu and nu from 0 to 3.

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