# Quadratic surface forms

From Encyclopedia of Mathematics

The first quadratic form, the second quadratic form and the third quadratic form of a surface are alternative, less often used, names for the first, second and third fundamental forms of a surface.

**How to Cite This Entry:**

Quadratic surface forms.

*Encyclopedia of Mathematics.*URL: http://encyclopediaofmath.org/index.php?title=Quadratic_surface_forms&oldid=13644