EntityQ382375· pop 12· linked from 14 articlesmonkey saddleSign in to savemathematical surfaceConnectionssaddle pointEntitymathematicsEntitymonkeyEntityInternational Standard Book NumberEntitycomplex numberEntitysaddleEntityOCLC, Inc.Entityinflection pointEntitycylindrical coordinate systemEntityMathWorldEntityEric W. WeissteinEntitycritical pointEntityGaussian curvatureEntitysurfaceEntityumbilical pointEntityCategoriesAlgebraic surfacesMultivariable calculus