Volume 41 - Issue 2 - January 2009

Mathematical Spectrum Click image to download issue


From the Editor
   p. 49

Sumlines
   Jonny Griffiths
   pp. 50-56

Curvature, Not Second Derivative
   Sonja Huber, Michael Hanke
   pp. 57-60

Room One
   Fred Witzgall
   pp. 61-63

A Tribute to Joseph Liouville: 2009 Marks the
   Bicentenary Anniversary of his Birth
   Scott H. Brown
   pp. 64-69

Radii of Touching Circles: A Trigonometric Solution
   Prithwijit De
   pp. 70-73

Degrees of Latitude
   A. W. F. Edwards
   pp. 74-76

The Purchasing Power of Earnings Worldwide: An
   Application of the Lognormal Distribution
   John C. B. Cooper
   pp. 77-80

Geometric and Harmonic Variations of the Fibonacci
   Sequence
   Ane J. Shiu, Carl R. Yerger
   pp. 81-86

Mathematics in the Classroom
   pp. 86-88

Letter to the editor: The last five digits of 1249¹²⁴⁹
   Abbas Roohol Amini
   p. 89

Problems and Solutions
   pp. 90-92

Book review: The Harmony of the World: 75 years of  Mathematics
   Magazine Edited by G. L.Alexanderson, P. Ross (MAA, 2007)
   Alastair Summers
   p. 93

Book review: Probably Not: Future Prediction Using Probability and
   Statistical Inference by L. N. Dworsky (John Wiley, 2008)
   Carol Nixon
   p. 94

Book review: Understanding Mathematics by K. Gregson
   (Nottingham University Press, 2007)
   Jonny Griffiths
   pp. 94-95

Book review: Calculus Gems: Brief Lives and Memorable Mathematics
   by G. F. Simmons (MAA, 2007)
   Jonny Griffiths
   p. 95