This book is an appropriate reference book intended for not only professional mathematicians but also aspirant readers who are eager to have basic knowledge of mathematical constants and special functions. Especially, for students and scholars who have interests in mathematical constants and special functions, this book is so inspiring and encouraging.Since the theory of constants and special functions has grown enormously, the present book reflects only one of the remarkable parts. In other words, we paid special attention to find out better approximation formulas and related...