The following picture From Pepe's Chakra-music album "Purification" looks like DAN TIAN from AI-KI-DO
MATHEMATICS OF TAOISM
The Unknown Parametric 3D-Formula for Spatial 3D HYPO-ASTROID, The Symbol of Yin&Yang HARMONY and TENNIS-BALL ( and/or BASEBALL)curve"s Form:X[t]=a*Cos[t]+(1-a)Cos[3*t];Y[t]=a*Sin[t]-(1-a)*Sin[3*t];Z[t]=4*((a*(1-a))^(1/2))Cos[t]Sin[t];a=(1/2)*(3-3^(1/2))=0.6339="Yin-Yang PLATINUM SECTION", suggested by S.Shishkov
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