Offers an excerpt from a paper written by Nicolay Lobachevsky (1792-1856) on the topic of the then new non-Euclidean geometry in tribute to this scientist as his 200th birthday approaches. Lobachevsky discusses his ideas about parallel lines in the context of his new geometry. (MDH)

The dates of birth and dealth of famous mathematicians and their major contributions to mathematics are described. Over 120 mathematicians are included. Six references are listed. (YP)

Some appearances of pi in a wide variety of problems are presented. Sections focus on some history, the first analytical expressions for pi, Euler's summation formula, Euler and Bernoulli, approximations to pi, two and three series for the arctangent, more analytical expressions for pi, and arctangent formulas for calculating pi. (MNS)

This article traces the history of zero and its dual role as a placeholder, albeit of empty space, and as a number for computational purposes. The use of one symbol for both situations is shown to be tied to the adoption, and subsequent promulgation, of our modern numbering system. (JJK)