Natural Invariant
Let 
be the fraction of time a typical dynamical Orbit spends in theinterval 
, and let 
be normalized such that
over the entire interval of the map. Then the fraction the time an Orbit spends in afinite interval
, is given by
The natural invariant is also called the Invariant Density or Natural Density.
- Ferguson-Forcade Algorithm
- Fermat 4n+1 Theorem
- Fermat Compositeness Test
- Fermat Conic
- Fermat Difference Equation
- Fermat Diophantine Equation
- Fermat Equation
- Fermat-Euler Theorem
- Fermatian
- Fermat-Lucas Number
- Fermat Number
- Fermat Number (Lucas)
- Fermat Point
- Fermat Polynomial
- Fermat Prime
- Fermat Pseudoprime
- Fermat Quotient
- Fermat's Algorithm
- Fermat's Congruence
- Fermat's Conjecture
- Fermat's Factorization Method
- Fermat's Last Theorem
- Fermat's Lesser Theorem
- Fermat's Little Theorem
- Fermat's Little Theorem Converse