Principal Curvature
In differential geometry, the two principal curvatures at a given point of a surface are the eigenvalues of the shape operator at the point. They measure how the surface bends by different amounts in different directions at that point.
Read more about Principal Curvature: Discussion, Formal Definition, Classification of Points On A Surface, Line of Curvature
Famous quotes containing the word principal:
“This place is the Devil, or at least his principal residence, they call it the University, but any other appellation would have suited it much better, for study is the last pursuit of the society; the Master eats, drinks, and sleeps, the Fellows drink, dispute and pun, the employments of the undergraduates you will probably conjecture without my description.”
—George Gordon Noel Byron (1788–1824)