Extended Data Fig. 7: Relative Root Mean Squared Error in the angular fit with large V₃.

(a) The angular dependence of nonreciprocity measured at ν = 2.15. (b) Relative root-mean-squared error (RRMSE), defined according to Eq. M2, as a function of V₁ (left panel), V₃ (middle panel), and β (right panel).

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