# Joint normal weight covariance

Original mathematical expression, diagram and generator: CC0-1.0.

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NG.29–NG.37 retain the actual degree-three torus translation and rank seam. The two exact joint unit vectors are (1,1)/sqrt(2) and (27,1)/sqrt(730); their plotted chord is the proved noncompact covariance gap. This is a countertest for the supplied weighting, not a graph-class nonexistence theorem.