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Matrix Identity (Posted on 2007-04-26) Difficulty: 2 of 5
If I is the 2x2 identity matrix, show that there is an infinite number of matrices X with integer members such that X*X = I.

See The Solution Submitted by Brian Smith    
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re: An Attempt To Generalisation | Comment 7 of 8 |
(In reply to An Attempt To Generalisation by K Sengupta)

This looks very good.

Can you prove the step where you go from m^2 Mod b = 1 to m Mod b = +/-1?


  Posted by Brian Smith on 2007-04-30 23:10:29
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