Contour
₁ΛM 0 -Critical points and their nature using hessian matrix
Critical points and their nature using hessian matrix
*From Book: Extended definitions of point location estimates https://www.geogebra.org/m/hhmfbvde
From: List of My Public Books on GeoGebra Topics: Constructing polyhedra -https://www.geogebra.org/m/eabstecp
