Archive for September 17, 2008

Fact for September 17, 2008 – a rather nice milk moustache

Posted in Uncategorized on September 17, 2008 by quantummoxie

More people in the world drink goat’s milk than drink cow’s milk.  Betcha didn’t know that.

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Fact for September 16, 2008 – computational accuracy

Posted in Uncategorized on September 17, 2008 by quantummoxie

Due to the vagaries of rounding, to a calculator or computer that is calculating to, say, eight decimal places,

((\frac{2}{3})+(\frac{2}{3}))-(\frac{1}{3}) \ne (\frac{2}{3})+((\frac{2}{3})-(\frac{1}{3})).

Thus computer arithmetic is not necessarily associative. In this case, while the former ought to come out to 1, the latter will actually be 0.99999997.