The first isodynamic point  has triangle center
 function
and is Kimberling center  (Kimberling 1998, p. 68).
The first isodynamic point  has triangle center
 function
and is Kimberling center  (Kimberling 1998, p. 68).
Weisstein, Eric W. "First Isodynamic Point." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/FirstIsodynamicPoint.html