Flexatube
A Flexagon-like structure created by connecting the ends of a strip of four squares after folding along45° diagonals. Using a number of folding movements, it is possible to flip the flexatube inside out sothat the faces originally facing inward face outward. Gardner (1961) illustrated one possible solution, andSteinhaus (1983) gives a second.
See also Flexagon, Hexaflexagon, Tetraflexagon
References
Cundy, H. and Rollett, A. Mathematical Models, 3rd ed. Stradbroke, England: Tarquin Pub., p. 205, 1989. Gardner, M. The Second Scientific American Book of Mathematical Puzzles & Diversions: A New Selection. New York: Simon and Schuster, pp. 29-31, 1961. Steinhaus, H. Mathematical Snapshots, 3rd American ed. New York: Oxford University Press, pp. 177-181 and 190, 1983.
Flexagons
- Lucas-Lehmer Residue
- Lucas-Lehmer Test
- Lucas' Married Couples Problem
- Lucas Number
- Lucas Polynomial
- Lucas Polynomial Sequence
- Lucas Pseudoprime
- Lucas Sequence
- Lucas's Theorem
- Lucky Number
- Lucky Number of Euler
- LUCY
- LU Decomposition
- Ludolph's Constant
- Ludwig's Inversion Formula
- Lukács Theorem
- Lune (Plane)
- Lune (Solid)
- Lune (Surface)
- Lunule
- Lusin's Theorem
- LUX Method
- Lyapunov Characteristic Exponent
- Lyapunov Characteristic Number
- Lyapunov Condition