
Robert Recorde
Welsh mathematician and inventor of the equals sign

Welsh mathematician and inventor of the equals sign
Robert Recorde (c. 1510 – 1558) was a Welsh physician and mathematician. He invented the equals sign (=) and also introduced the pre-existing plus (+) and minus (−) signs to English speakers in 1557.
Read on Wikipedia · Image Basher Eyre, CC BY-SA 2.0
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