A double point at which two (or more) osculating curves are tangent. The above plot shows the tacnode of the curve .
The capricornoid and links curve have tacnodes at their origins.
A double point at which two (or more) osculating curves are tangent. The above plot shows the tacnode of the curve .
The capricornoid and links curve have tacnodes at their origins.
Weisstein, Eric W. "Tacnode." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Tacnode.html