is integrated into metaphysical argument." Ivor Grattan-Guinness made an in-depth study of Principles. First he published Dear Russell – Dear Jourdain (1977), which included correspondence with Philip Jourdain who promulgated some of the book’s ideas. Then in 2000 Grattan-Guinness published The Search for Mathematical Roots 1870 – 1940, which considered the author’s circumstances, the book’s composition and its shortcomings. In 2006, Philip Ehrlich challenged the validity of Russell's analysis of infinitesimals in the Leibniz tradition. A recent study documents the non-sequiturs in Russell's critique of the infinitesimals of Gottfried Leibniz and Hermann Cohen. See also Introduction to Mathematical Philosophy Russellian change Notes References Stefan Andersson (1994). In Quest of Certainty: Bertrand Russell's Search for Certainty in Religion and Mathematics Up to The Principles of Mathematics. Stockholm: Almquist & Wiksell. . External links The Principles of Mathematics – Free searchable full text versions in PDF, ePub and HTML formats The Principles of Mathematics – Online text (scan of original) The Principles of Mathematics – Full text at the Internet Archive The Principles of Mathematics at PhilPapers 1903 non-fiction books Books by Bertrand Russell English-language books Logic literature Mathematics books Methodology Philosophy books Cambridge University Press books