Multiplicative Magic Square/Examples/Order 3/Smallest/Historical Note

Historical Note on Multiplicative Magic Square with Smallest Magic Constant

The order $3$ multiplicative magic square with the smallest magic constant is believed to have been discovered by Georges Pfeffermann in $1893$.

Some sources erroneously ascribe it to Harry A. Sayles in $1913$, as work by Georges Pfeffermann has only recently come to light.

It is also sometimes erroneously ascribed to Henry Ernest Dudeney, who in $1917$ also rediscovered it.

Sources

• 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $216$
• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $216$

• Weisstein, Eric W. "Multiplication Magic Square." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/MultiplicationMagicSquare.html