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Topic: Bimagic Square Reconstruction (Read 1820 times) 

Barukh
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A bimagic square is a magic square that retains its properties after every element is squared. That is: A bimagic square is a square matrix n x n with the following properties: 1. Every number 1, ..., n^{2} appears in the matrix. 2. The sum of numbers at every row, every column and two main diagonals is the same. 3. The sum of squares of numbers at every row, every column and two main diagonals is the same. That bimagic squares exist is not immediately evident (at least for me). However, it was proved that they exist for every n > 7. Now  the problem. You are given a partially populated bimagic square of order 8. Put in the missing numbers. It is very probable that solution may be obtained  and quite quickly  by programming. The question is: how far can we go without any programming at all? Note that this bimagic square was built 124 years ago!

« Last Edit: Aug 9^{th}, 2014, 7:22am by Barukh » 
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rmsgrey
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Re: Bimagic Square Reconstruction
« Reply #1 on: Aug 10^{th}, 2014, 7:43am » 
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nitpick: two of the square's properties (1 and 3 in your list) are not retained when every element is squared...


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dudiobugtron
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Re: Bimagic Square Reconstruction
« Reply #2 on: Aug 10^{th}, 2014, 5:14pm » 
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on Aug 10^{th}, 2014, 7:43am, rmsgrey wrote:nitpick: two of the square's properties (1 and 3 in your list) are not retained when every element is squared... 
 I took 'that is' to be an indicator that the properties listed were a more rigourous definition; a rewording of the earlier definition rather than a continuation.


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