Folk Mathematics
If modern mathematical practices are what distinguish modern professional mathematicians from older ideas of folk mathematics. Although such "folk" practices may well include useful formulae or algorithms, they are generally without the accompanying proof discipline.
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Famous quotes containing the words folk and/or mathematics:
“An’ when the earth’s as cauld’s the mune
An’ a’ its folk are lang syne deid,
On coontless stars the Babe maun cry
An’ the Crucified maun bleed.”
—Hugh MacDiarmid (1892–1978)
“I must study politics and war that my sons may have liberty to study mathematics and philosophy.”
—John Adams (1735–1826)