Special mathematical functions
From cppreference.com
                    
                                        
                    
                    
                                                            
                    The Special Mathematical Functions library was originally implemented as boost.math, later featured as part of Library TR1 ISO/IEC TR 19768:2007, then published as an independent ISO standard, ISO/IEC TR 29124:2010, and finally merged to ISO C++ as of C++17.
See special math TR for the ISO/IEC TR 29124:2010 version of this library.
[edit] Functions
| Defined in header  <cmath> | |
| (C++17)(C++17)(C++17) | associated Laguerre polynomials (function) | 
| (C++17)(C++17)(C++17) | associated Legendre polynomials (function) | 
| (C++17)(C++17)(C++17) | beta function (function) | 
| (C++17)(C++17)(C++17) | (complete) elliptic integral of the first kind (function) | 
| (C++17)(C++17)(C++17) | (complete) elliptic integral of the second kind (function) | 
| (C++17)(C++17)(C++17) | (complete) elliptic integral of the third kind (function) | 
| (C++17)(C++17)(C++17) | regular modified cylindrical Bessel functions (function) | 
| (C++17)(C++17)(C++17) | cylindrical Bessel functions (of the first kind) (function) | 
| (C++17)(C++17)(C++17) | irregular modified cylindrical Bessel functions (function) | 
| (C++17)(C++17)(C++17) | cylindrical Neumann functions (function) | 
| (C++17)(C++17)(C++17) | (incomplete) elliptic integral of the first kind (function) | 
| (C++17)(C++17)(C++17) | (incomplete) elliptic integral of the second kind (function) | 
| (C++17)(C++17)(C++17) | (incomplete) elliptic integral of the third kind (function) | 
| (C++17)(C++17)(C++17) | exponential integral (function) | 
| (C++17)(C++17)(C++17) | Hermite polynomials (function) | 
| (C++17)(C++17)(C++17) | Legendre polynomials (function) | 
| (C++17)(C++17)(C++17) | Laguerre polynomials (function) | 
| (C++17)(C++17)(C++17) | Riemann zeta function (function) | 
| (C++17)(C++17)(C++17) | spherical Bessel functions (of the first kind) (function) | 
| (C++17)(C++17)(C++17) | spherical associated Legendre functions (function) | 
| (C++17)(C++17)(C++17) | spherical Neumann functions (function) |