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TIME: Almanac 1990
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1990 Time Magazine Compact Almanac, The (1991)(Time).iso
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061989
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06198900.032
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1990-09-22
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NATION, Page 37American NotesMATHEMATICSAs American as Apple Pi
Pi, as every schoolchild used to know, is the ratio of the
circumference of a circle to its diameter. But in the electronic
age, the ancient Babylonian constant -- or rather the accurate
calculation of its value -- has become a symbol of computational
prowess. In the 1950s the U.S. led the way, churning out estimates
of pi accurate to thousands and tens of thousands of decimal
places. Then the French took the lead. With the emergence of
Japan's supercomputer industry in the 1980s, pi has become an
almost exclusive province of the Japanese. The last world record,
201 million digits, was set on a Japanese supercomputer in 1988.
Now 3.14159 . . . is once again as American as apple pie. Or
nearly so. Using U.S.-made supercomputers, two Columbia University
mathematicians have established a new record: 480 million digits,
a number that, if printed out linearly, would extend 600 miles. The
feat was accomplished by David and Gregory Chudnovsky, Soviet
emigre brothers who took jingoistic pride in beating the Japanese.
"They may have faster supercomputers," says David Chudnovsky, "but
they don't have our Yankee know-how."