## Seminar

## Multiplying and Dividing Before 1202

## Fr. Jean Turgeon

### Loyola University Maryland

Jesuit Chair Department of Mathematics and Statistics

### February 29, 2012

3:00-4:00

### B01 Knott Hall

Abstract:
In 1202, Leonardo of Pisa introduced in Europe the positional system of numeration. This
system was gradually adopted, with some resistance, and algorithms were either invented or
borrowed from the Indians and the Arabs for the operations of multiplication and division. Some
of these methods survive up to our time, others disappeared with the invention of printing.
Historians of mathematics disagree among themselves about the existence of algorithms for the
operations of multiplication and division in more ancient systems of numeration. I propose to
discuss these questions with you.

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