Skew Quadrilateral
A four-sided Quadrilateral not contained in a plane. The problem of finding the minimum bounding surface of a skew quadrilateral was solved by Schwarz (1890) in terms of Abelian Integrals and has the shape of a Saddle. It is given by solving
See also Quadrilateral
References
Isenberg, C. The Science of Soap Films and Soap Bubbles. New York: Dover, p. 81, 1992. Forsyth, A. R. Calculus of Variations. New York: Dover, p. 503, 1960. Schwarz, H. A. Gesammelte Mathematische Abhandlungen, 2nd ed. New York: Chelsea.
- Principal Ideal
- Principal Normal Vector
- Principal Quintic Form
- Principal Radius of Curvature
- Principal Value
- Principal Vector
- Principal Vertex
- Principle
- Pringsheim's Theorem
- Printer's Errors
- Prior Distribution
- Prism
- Prismatic Ring
- Prismatoid
- Prismoid
- Prisoner's Dilemma
- Prizes
- Probability
- Probability Axioms
- Probability Density Function
- Probability Distribution Function
- Probability Function
- Probability Inequality
- Probability Integral
- Probability Measure