Mathematician:Leonhard Paul Euler/Mistake

Source Work

 * The Dictionary
 * $3 \cdotp 14159 \, 26535 \, 89793 \, 23846 \, 26433 \, 83279 \, 50288 \, 41972 \ldots$
 * $3 \cdotp 14159 \, 26535 \, 89793 \, 23846 \, 26433 \, 83279 \, 50288 \, 41972 \ldots$

Mistake

 * Euler ... gave an even more impressive demonstration of the power of these new methods by calculating $\pi$ to $20$ decimal places in just one hour.

In, this has been amended to:
 * ... $10$ places in just one hour.

It is assumed that the original statement of $20$ must have been erroneous, and that the second edition corrected it.

However, this needs to be properly established by investigating the literature. does not provide a source.