Definition:Square Root/Historical Note
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Definition
It is suggested by some sources that the symbol $\surd$ (a stylised r for radix) for the square root may have originated with René Descartes, but there is evidence that it may have been around a lot earlier than that.
Sources
- 2008: Ian Stewart: Taming the Infinite ... (previous) ... (next): Chapter $4$: Lure of the Unknown: Algebraic symbolism