GammaFunction Gamma Function in Delphi. 🟥 Reference 🟩 Ooura's Mathematical Software Packages Special Functions - Gamma / Error Functions gamerf.zip cdgamma.c :Complex Gamma Function in C dgamma.c :Gamma Function in C dlgamma.c :Log Gamma Function in C ガンマ関数および誤差関数の初等関数近似とその最適化 jsiam95.pdf