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:
“the yonge sonne
Hath in the Ram his halfe cours yronne,
And smale foweles maken melodye,
That slepen al the nyght with open eye—
So priketh hem nature in hir corages—
Thanne longen folk to goon on pilgrimages,”
—Geoffrey Chaucer (1340?–1400)
“... though mathematics may teach a man how to build a bridge, it is what the Scotch Universities call the humanities, that teach him to be civil and sweet-tempered.”
—Amelia E. Barr (1831–1919)