The Transmission of Mathematical Ideas from India and Islam to the West Professor Victor Katz: Abstract: In recent years there has been much research on the developments in mathematics in India and the Islamic world in such areas as trigonometry, algebra, number theory, geometry, and calculus. Yet, it is still generally believed that in most cases, even when mathematical advances were made in these places, the knowledge of these advances did not reach Europe in time for the ideas to have an impact and therefore that the Europeans developed these ideas anew without any help. A major question of current interest, then, is whether in fact that statement is true. There seem to be more and more indications that ideas traveled to Europe through routes that were previously unknown. In these two talks, we will consider some of the evidence for this transmission of ideas, including some evidence which now seems reasonably conclusive and other evidence which is still only circumstantial. Areas of current research in this aspect of the history of mathematics will be discussed. The three references mentioned in the 2nd lecture on calculus ideas in India are: David Bressoud, Was Calculus Invented in India? College Mathematics Journal 33 (2002), 2-13 Victor Katz, Ideas of Calculus in Islam and India, Mathematics Magazine 68 (1995), 163-174 Ranjan Roy, The Discovery of the Series Formula for Pi by Leibniz, Gregory, and Nilakantha, Mathematics Magazine 63 (1990), 291-306 All of these articles will appear in a collection of MAA articles on the history of mathematics, that I am editing, along with Robin Wilson and Marlow Anderson. This volume will probably come out by late summer. Some of the other material from my two talks is in my textbook: A History of Mathematics: An Introduction (Addison-Wesley, 1998).