The incomplete gamma function Q(a,x) is defined in Section 5.5.3.
						                            Source(s):
						                            
								                            
                                                                    NIST SP 800-22 Rev. 1a
									                            
						                            
						                            
						                        
					                            
						                              See the definition for igamc.
						                            Source(s):
						                            
								                            
                                                                    NIST SP 800-22 Rev. 1a
										                             under Incomplete Gamma Function