Quadratic Irrational Number
An Irrational Number of the form
where
and 
are Integers and 
is a Squarefree Integer. Quadratic irrational numbersare sometimes also called Lagrange 
proved that that anyquadratic irrational has a Continued Fraction which is periodic after some point.See also Continued Fraction, Quadratic Surd- Concatenated Number Sequences
- Concatenation
- Concave
- Concave Function
- Concentrated
- Concentric
- Concentric Circles
- Conchoid
- Conchoid of de Sluze
- Conchoid of Nicomedes
- Concho-Spiral
- Concordant Form
- Concur
- Concurrent
- Concyclic
- Condition
- Conditional Convergence
- Conditional Probability
- Condition Number
- Condom Problem
- Condon-Shortley Phase
- Conductor
- Cone
- Cone Graph
- Cone Net