Jacobsthal Polynomial
The Jacobsthal polynomials are the Polynomials obtained by setting 
and 
in theLucas Polynomial Sequence. The first few Jacobsthal polynomials are
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and the first few Jacobsthal-Lucas polynomials are
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Jacobsthal and Jacobsthal-Lucas polynomials satisfy
where
is a Jacobsthal Number and 
is a Jacobsthal-Lucas Number.- Re-Entrant Circuit
- Refinement
- Reflection
- Reflection Property
- Reflection Relation
- Reflexible
- Reflexible Map
- Reflexive Closure
- Reflexive Graph
- Reflexive Reduction
- Reflexive Relation
- Reflexivity
- Region
- Regression
- Regression Coefficient
- Regula Falsi
- Regular Function
- Regular Graph
- Regular Isotopy
- Regular Isotopy Invariant
- Regularity Theorem
- Regularized Beta Function
- Regularized Gamma Function
- Regular Local Ring
- Regular Number