Volume 40 - Issue 1 - September 2007

Mathematical Spectrum Click image to download issue

From the Editor
   pp. 1-2

An Inequality Connected with a Special Point of a Triangle
   Zhang Yun
   pp. 3-8

On the Divergence of p-like Series with p> 1
   Hossein Behforooz
   pp. 9-16

The Picture-Perfect Numbers
   Joseph L. Pe
   pp. 17-23

Sums of Consecutive Numbers Modulo n
   Philip Maynard
   pp. 24-25

Oblique-Angled Diameters and Conic Sections
   Edward Greve, Thomas J. Osler
   pp. 26-30

Picture This: From Inscribed Circle to Pythagorean Proposition
   D. G. Rogers
   pp. 31-36

Mathematics in the Classroom
   pp. 36-37

Letter to the Editor: Curious powers
   Abbas Roohol Amini
   p. 38

Letter to the Editor: Stability analysis on SARS epidemics
   Bor-Yann Chen
   pp. 38-39

Letter to the Editor: Rational approximation to square roots
   Bor-Yan Chen
   pp. 39-40

Letter to the Editor: Why is 1³ + 2³ + ··· + n³ = (1 + 2 + ··· + n)²
   M. A. Khan
   p. 40

Problems and Solutions
   pp. 41-45

Book review: Bayers Linear Statistics by M. Goldstein, 
   D. Wooff (John Wiley, 2007)
   p. 45

Book review: The R Book by M. J. Crawley (John Wiley, 2007)
   p. 45

Book review: American Regions Math League & ARML Power Contests
   1995-2003 by D. Barry, T. Kilkelly (ARML, 2004)
   Paul Belcher
   pp. 46-47

Book review: The Edge of the Universe: Celebrating Ten Years of Math
   Horizons Edited by D. Haunsperger, S. Kennedy (MAA, 2006)
   Alastair Summers
   p. 47