Genus (Curve)
One of the Plücker Characteristics, defined by
where
is the class, 
the order, 
the number of nodes, 
the number of Cusps, 
the number of stationary tangents (Inflection Points), and 
the number of Bitangents.See also Riemann Curve Theorem
References
Coolidge, J. L. A Treatise on Algebraic Plane Curves. New York: Dover, p. 100, 1959.
- Unambiguous
- Unbiased
- Uncia
- Uncorrelated
- Uncountable Set
- Uncountably Infinite Set
- Undecagon
- Undecidable
- Undecillion
- Undetermined Coefficients Method
- Undulating Number
- Unduloid
- Unexpected Hanging Paradox
- Unfinished Game
- Unhappy Number
- Unicursal Circuit
- Uniform Apodization Function
- Uniform Boundedness Principle
- Uniform Convergence
- Uniform Distribution
- Uniform Polyhedron
- Uniform Variate
- Unimodal Distribution
- Unimodal Sequence
- Unimodular Group