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BUILT-IN MATHEMATICA SYMBOL
QuadraticIrrationalQ
QuadraticIrrationalQ[x]
gives True if x is a quadratic irrational and False otherwise.
Details
- QuadraticIrrationalQ[x] tests whether x can be expressed in the form
, where 
, 
and 
are integers. - Quadratic irrationals have continued fractions that are ultimately periodic.
New in 6
