Involution (Operator)

An Operator of period 2, i.e., an Operator which satisfies .

• Honeycomb
• Hoof
• Hook
• Hook Length Formula
• Hopf Algebra
• Hopf Bifurcation
• Hopf Circle
• Hopf Link
• Hopf Map
• Hopf's Theorem
• Horizontal
• Horizontal-Vertical Illusion
• Horn Angle
• Horn Cyclide
• Horned Sphere
• Horner's Method
• Horner's Rule
• Horn Torus
• Horocycle
• Horse Fetter
• Horseshoe Map
• Hough Transform
• Householder's Method
• Howell Design
• H-Spread