Principia Mathematica Vol. 1 - 3 by Russel, B., Whitehead, A. N.
English | 1927 | ISBN: N/A | 1980 Pages | PDF | 62 MB
Written as a defense of logicism (the thesis that mathematics is in some significant sense reducible to logic), the book was instrumental in developing and popularizing modern mathematical logic. It also served as a major impetus for research in the foundations of mathematics throughout the twentieth century.