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"To avoide the tediouse repetition of these woordes: is equalle to: I will settle as I doe often in woorke use, a paire of paralleles, or gemowe lines of one lengthe: ======, bicause noe .2. thynges, can be moare equalle."
Welsh mathematician Robert Recorde (1510–1558) invented the equals sign
in his 1557 work The Whetstone of Witte
, which also introduced "Zenzizenzizenzic"
, the eighth power of a number. Recorde had advocated the + and – symbols in his 1540 work The Grounde of Artes
. He died in debtor's prison in 1558. Read, watch, or listen to a recent lecture
that links the equals sign to developments in art, navigation, and astronomy. (Wikipedia
posted by goatdog
on Dec 16, 2005 -