===== Logarithmic integral function =====
==== Function ====
| @#FFBB00: definiendum | @#FFBB00: $ \mathrm{li}: \mathbb R_+\to \mathbb R_+$ |
| @#FFBB00: definiendum | @#FFBB00: $ \mathrm{li}(x) := \int_0^x \frac{1}{\ln(t)}\mathrm d t $ |

==== Discussion ====
=== Reference ===
Wikipedia: [[http://en.wikipedia.org/wiki/Logarithmic_integral_function|Logarithmic integral function]]
==== Parents ====
=== Subset of ===
[[ℝ valued function]]
=== Requirements ===
[[Cauchy principal value]]