Book:Robert Recorde/The Whetstone of Witte, whiche is the seconde parte of Arithmeteke: containing the extraction of rootes; the cossike practise, with the rule of equation; and the workes of Surde Nombers

Robert Recorde: The Whetstone of Witte, whiche is the seconde parte of Arithmeteke: containing the extraction of rootes; the cossike practise, with the rule of equation; and the workes of Surde Nombers

Published $\text {1557}$.

Subject Matter

• Arithmetic

in which can be found:

a description of the cossist practice

the first appearance in print of the equals sign

the word zenzizenzizenzic.

Contents

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Sources

• 2008: Ian Stewart: Taming the Infinite ... (previous) ... (next): Chapter $4$: Lure of the Unknown: Algebraic symbolism