mathematics

Describe the bug

The analytical integral of the RooPoisson is implemented wrongly for the case where the boundaries are 0 < a < 1e30 and b >= 1e30.

Expected behavior

The integral should be correct.

To Reproduce

The wrong integral can be reproduced with this code snippet.

void testPoissonIntegral() {

   const double mu = 100;
   const double inf = std::

IEEE 754 recommends (but does not require) a compound function, which is in the process of being standardized for C and C++; we should expose it in swift-numerics. The simplest, most literal translation of the operation into Swift would be:

extension RealFunctions {
  /// (1+x)ⁿ
  /// 
  /// Returns NaN if x < -1.
  static func compound(_ x: Self, _ n: Int) -> Self {
    // not

What is the feature or improvement you would like to see?

A function that computes the graph center, and the graph periphery. The graph center is the set of vertices that has minimal eccentricity. The periphery is the set with maximal eccentricity.

Use cases for the feature

This is a standard concept in graph theory.

**Implementatio