affine principal curvature

center of principal curvature

direction of principal curvature

hamilton principal function

minimum principal curvature

principal curvature

principal function

Principal Function Area Division

radius of principal curvature

Curvature function

Lp - curvature function

periodic curvature function

delta function (=δ-function)

function， function key

principal vector and principal moment

influence of lumbar curvature on cervical curvature

Analgesia function and anti-inflammation function

calibration function or curve [function]

characteristic function (= eigen-function)