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American Mathematical Monthly publishes articles, notes, and other features about mathematics and the profession. AMM readers span a broad spectrum of mathematical interests, and include professional mathematicians as well as students of mathematics at all collegiate levels.

Publisher: Mathematical Association of America

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Volume 114, Number 10, December 2007

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On Direct and Inverse Proportionality
pp. 871-881(11)
Authors: Halmetoja, Markku; Haukkanen, Pentti; Laurinolli, Teuvo; Merikoski, Jorma K.; Tossavainen, Timo; Virtanen, Ari

The Jordan Curve Theorem, Formally and Informally
pp. 882-894(13)
Author: Hales, Thomas C.

The Poncelet Grid and Billiards in Ellipses
pp. 895-908(14)
Authors: Levi, Mark; Tabachnikov, Serge

A Property of Parallelograms Inscribed in Ellipses
pp. 909-914(6)
Authors: Connes, Alain; Zagier, Don

An Elementary Proof of the Wallis Product Formula for pi
pp. 914-914(1)
Authors: Wästlund, Johan

Automorphisms of Finite Abelian Groups
pp. 917-917(1)
Authors: Hillar, Christopher J.; Rhea, Darren L.

On the Adjugate of a Matrix
pp. 923-923(1)
Authors: de Oliveira, António Guedes

Problems and Solutions
pp. 925-932(8)

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