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The almanac

UPI Almanac for Sunday, Nov. 17, 2013.
By United Press International

The almanac

UPI Almanac for Saturday, Nov. 17, 2012.
By United Press International

The almanac

UPI Almanac for Thursday, Nov. 17, 2011.
By United Press International

The almanac

UPI Almanac for Monday, Nov. 17, 2008.
By United Press International

The almanac

UPI Almanac for Saturday, Nov. 17, 2007.
By United Press International

The Almanac

UPI almanac for Friday, Nov. 17, 2006.
By United Press International

The Almanac

Today is Thursday, Nov. 17, the 321st day of 2005 with 44 to follow.
By United Press International

The Almanac

Today is Wednesday, Nov. 17, the 322nd day of 2004 with 44 to follow.
By United Press International

The Almanac

Today is Monday, Nov. 17, the 321st day of 2003 with 44 to follow.
By United Press International

The Almanac

Today is Sunday, Nov. 17, the 321st day of 2002 with 44 to follow.
By United Press International

The Almanac

Today is Saturday, Nov. 17, the 321st day of 2001 with 44 to follow.
By United Press International
Wiki

August Ferdinand Möbius (November 17, 1790 – September 26, 1868; German pronunciation: ) was a German mathematician and theoretical astronomer.

He is best known for his discovery of the Möbius strip, a non-orientable two-dimensional surface with only one side when embedded in three-dimensional Euclidean space. It was independently discovered by Johann Benedict Listing around the same time. The Möbius configuration, formed by two mutually inscribed tetrahedra, is also named after him. Möbius was the first to introduce homogeneous coordinates into projective geometry.

Many mathematical concepts are named after him, including the Möbius transformations, important in projective geometry, and the Möbius transform of number theory. His interest in number theory led to the important Möbius function μ(n) and the Möbius inversion formula. In Euclidean geometry, he systematically developed the use of signed angles and line segments as a way of simplifying and unifying results.

This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia article "August Mobius."
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