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Convergence articles

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A discussion of why we use "e" to represent the base of the natural logarithm system.
This book is a collection of mathematical ideas organized around the themes of infinity and the illumination of the nature of mathematical thought.
2007 marks the three hundredth anniversary of the birth of Leonhard Euler, the most prolific mathematician of all time. There are numerous events throughout the world celebrating this anniversary, many of which are listed here.
A square walled city measures 10 li on each side. At the center of each side is a gate. Two persons start walking from the center of the city.
The purchase price for an apple and an orange is 100 yen. When n oranges and n + 3 apples are bought the price is 520 yen. Find the number n of oranges and the price of one orange.
Given a right triangle where you know the length of the base and the sum of the perpendicular side and the hypotenuse.

After completing this assignment on Simon Stevin's treatment of decimal fractions in his 1585 De Thiende, the author's preservice mathematics teachers understood why our usual procedure for multiplying such fractions works.
A set of four posters dealing with the Pythagorean Theorem, infinity, prime numbers, and the history of pi.
There is a circle from within which a square is cut, the remaining portion having an area of 47.6255 square units.
A survey of concepts of infinite sets over the centuries.