Mathematical Spectrum

1998/9 Volume 31 Number I

1 Mahaviracarya: the poet and the mathematician: MAHESH DUBE

7 Some properties of the number five: J. D. WESTON

9 The RSA algorithm: a public-key cryptosystem: MICHAEL J. WILLIAMS and LINDA J. S. ALLEN

14 A problem of Leonardo of Pisa: S. G. ROUT

17 Mathematics in the classroom

18 Computing column

19 Letters to the editor 21 Problems and solutions 23 Reviews

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MATHEMATICAL SPECTRUM

1998/9 VoL. 31 NO. 3

49 Pierre-Simon de Laplace: 1749-1827
ROGER COOK

52 The Golden Ratio by Origami
P. GLAISTER

53 A Property of the Catenary
FRANK CHORLTON

55 Some Trigonometric Inequalities
MASAKAZU NIHEI

58 A Story from Flocklore
K. R. S. SASTRY

62 Mathematics in the classroom

63 Computer column
65 Letters to the editor

69 Problems and solutions

70 Reviews

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Mathematical Spectrum
Volume 31, Number 2, 1999



Some prime results 25
MANSUR S. BOASE

The sequence p(n) - 1 29
K. PRAKASH


The Josephus problem and Ahren's array 30
I. M. RICHARDS


Some integrals evaluated 34
FRANK CHORLTON


Reversing digits , 35
ROGER COOK


Calculus Unequalled 38
P. GLAISTER


Cigarette butts 40
DAVID SINGMASTER


Mathematics in the classroom 41

Computer column 42

Letters to the editor 44

Problems and solutions 45

Reviews 47

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