Mathematics Asked on December 27, 2021
If 1-9 is filled in the $3 times 3$ determinant, and each number appears once,then the maximum value of the determinant is $412$.
For example, the following determinant can take the maximum value of $412$:
$$left|
begin{array}{ccc}
1 & 4 & 8 \
7 & 2 & 6 \
5 & 9 & 3 \
end{array}
right|=412.$$
Question: if 1-16 is filled in the $4times4$ determinant, and each number appears once, what is the maximum value of the determinant? Is it necessarily less than $16 times 15 times 14 times 13= 43680$?
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