内容简介
ADVANTAGE has been taken of the prearation of the fourth edition of this work to add a few additional referens and to make a number of corrections of minor errors.
Our thanks are bue to a number of our readers for pointing out errors and misprints,and in particular we are grateful to Mr E.T.Copson,Lecturer in mathematics in the University Edinburgh,for the trouble which he has taken in supplying us with a somewhat lenthy list.