Convergence articles

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I owe a man the following notes: one of $800 due May 16; one of$660 due on July 1; one of $940 due Sept. 29. He wishes to exchange them for two notes of$1200 each and wants one to fall due June 1. When should the other be due?
Page 6: Images from the Paul Halmos Photo Collection of Abram Besicovitch, R. H. Bing, Burton W. Jones, Garrett Birkhoff, Abolghassem Ghaffari, Errett Bishop, and Max Black
A wonderful book about the square root of 2, beginning with the search for the side of a square double a given square.
This is the title page of the Margarita philosophica (Pearl of Wisdom) of Gregor Reisch (1467 - 1525). The first edition was published in 1503. This work was used as a university textbook in the early sixteenth century.
A collection of articles about historical and contemporary women in mathematics.
A vessel is anchored in 3 fathoms of water and the cable passes over a sheave in the bowspirt which is 6 ft above the water.
A translation of one of the earliest European mathematical texts to use the Hindu-Arabic number system.

A man, woman, and two boys desire to cross a river, but their boat has weight restrictions!

A brief history of mathematics aimed at college students with little technical knowledge of mathematics.

Review of a book that suggests that the accepted historical chronology is fundamentally flawed.