A study of light coming from galaxy clusters has yet again given the thumbs up to the general theory of relativity, Albert Einstein’s famous theory of gravity. Done by physicists in Denmark who ...

THIS “Introduction to Vector-methods and their Various Applications to Physics and Mathematics” is an exposition of the late Willard Gibbs' vector analysis. The author in his preface warns us that “no ...

AN excellent introduction to the subject of vector analysis is provided by this book. It is admirably clear, and a natural temptation to develop so fertile a theory in excessive detail and to multiply ...