#paperback#mathematics#math#physics#logic#vintage "The structural simplicity of equations in mathematical physics in Cartesian firm is often hidden by the labour of writing out every term explicitly. The use of tensor notation with the summation convention overcomes the difficulty; and it is the object of this work to illustrate the use of such methods." This slim book is in good vintage condition, with little wear on the spine or binding. A few underlines and scribbles on the pages give it character. Originally published in 1931, this edition was printed in 1963.