Inflection point of a plane cubic
= Inflection point of a plane cubic
= Plane cubic flex
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= Inflection points of a plane cubic
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An inflection point of a smooth plane cubic is a point where its tangent line has intersection multiplicity three. Once one inflection point is chosen as the identity, the nine geometric inflection points are exactly the <torsion point of an elliptic curve>[3-torsion points].