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Review of The Lost Millennium: History's Timetables under Siege

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

A series of circles have their centers on an equilateral hyperbola and pass through its center. Show that their envelope is a lemniscate.

Isaac Newton

This is the title page of the 1779 edition of the works of Isaac Newton known at that time. Note that this is a much shorter book than the recent eight volume collection of Newton's mathematical papers, edited by Derek Whiteside.

Japanese Temple Problem 2

The triangle ABC has a right angle at C. Show that 1/ED=1/AC+1/AB

Snowdrift on the Tracks

A railway train strikes a snowdrift which creates a constant resistance. How long does it take the snow to stop the train?

Tree and Vine

A tree is 2 zhang tall and has a circumference of 3 chi. There is a vine that winds seven equally spaced times around the tree and reaches the top. What is the length of the vine?

Pioneers in Mathematics

A five-volume set of biographies of mathematicians from ancient times to the twentieth century, aimed at secondary students.

A Hole in One?

A barrel has various holes in it. The first hole empties the barrel in three days...

Bargain Houses

A man agreed to pay for 13 valuable houses worth $5000 each, what the last would amount to, reckoning 7 cents for the first, 4 times 7 cents for the second, and so on, increasing the price 4 times on each to the last.

HOM SIGMAA 2009 Award Winners

These are the winning entries from the annual History of Mathematics SIGMAA Student Paper Contest.