The directions in which the principal curvatures occur.
Principal Direction
See also
Principal CurvaturesExplore with Wolfram|Alpha
References
Gray, A. Modern Differential Geometry of Curves and Surfaces with Mathematica, 2nd ed. Boca Raton, FL: CRC Press, p. 364, 1997.Referenced on Wolfram|Alpha
Principal DirectionCite this as:
Weisstein, Eric W. "Principal Direction." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/PrincipalDirection.html