Young Girl-Old Woman Illusion
A perceptual Illusion in which the brain switches between seeing a young girl and an old woman.
See also Rabbit-Duck Illusion
References
Pappas, T. The Joy of Mathematics. San Carlos, CA: Wide World Publ./Tetra, p. 173, 1989.
- Hankel Function of the First Kind
- Hankel Function of the Second Kind
- Hankel Matrix
- Hankel's Integral
- Hankel Transform
- Hann Function
- Hanning Function
- Hanoi Graph
- Hanoi Towers
- Hansen-Bessel Formula
- Hansen Chain
- Hansen Number
- Hansen's Problem
- Happy Number
- Harada-Norton Group
- Harary Graph
- Hard Hexagon Entropy Constant
- Hard Square Entropy Constant
- Hardy-Littlewood Conjectures
- Hardy-Littlewood Constants
- Hardy-Littlewood k-Tuple Conjecture
- Hardy-Littlewood Tauberian Theorem
- Hardy-Ramanujan Number
- Hardy-Ramanujan Theorem
- Hardy's Inequality