Real functions
1. Trigonometric functions.
2. Hyperbolic functions.
3. The natural exponential function.
4. The natural logarithm.
5. Exponential and logarithmic functions.
6. Inverse hyperbolic functions.
7. Series expansions
8. The Bernoulli's and Euler's numbers
9. Cotangents and tangents, cosecants and secants
10. The ζ (zeta) function
11. The Euler's Γ, generalized binomial coefficients, Stirling's approximation

Last revision: Febbruary 2017