A portrait of Leonhard Euler from the Dibner Library of the History of Science and Technology, made available through the Smithsonian Institution's Scientific Identity Collection.

A portrait of Leonhard Euler from the Dibner Library of the History of Science and Technology, made available through the Smithsonian Institution's Scientific Identity Collection.

A portrait of Leonhard Euler from the Dibner Library of the History of Science and Technology, made available through the Smithsonian Institution's Scientific Identity Collection.

This site gives a general description of one of Euler's contributions, topology. It also presents one of the more famous problems of mathematics, The Bridges of Konigsberg.

Lengthy biography of Euler that sets him in relationship with his contemporaries in mathematics and physics. Several quotes and pictures available, as well as links to relevant mathematical topics. A terrific site.

The base of the natural logarithm function, is called Euler's number, in honor of Leonhard Euler, a great Swiss mathematician. (Continued. See "before the activity.")

This lesson focuses on developing a way to cross all 7 Bridges of Konigsberg without crossing any of them more than once. Euler discovered it was impossible, but he developed the idea of using graph theory to determine if it would be...

You'd have a hard time finding the medieval city Konigsberg on any modern maps, but one particular quirk in its geography has made it one of the most famous cities in mathematics. Dan Van der Vieren explains how grappling with...

See if you can solve this classic problem that Leonhard Euler first presented in 1736. Use the interactive section of this website to help you.

A listing of some of the more famous formulas developed and used throughout the centuries for defining pi are given and explained.

This site describes the magic of numbers through different mathematicians. Contributions of the following mathematicians: Pierre de Fermat, Pitagoras de Samos, Nicomaco de Gerasa, Diofanto de Alejandria, G. Bachet de Meziriac, Rene...

In Spanish. In chess there are many mathematical problems related to the way the pieces move on the board. Chess is more than just a game. By playing chess students can develop their problem solving skills. Several chess activities are...