Sets of Matrices Closed Under Matrix Multiplication
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Solution Summary
Given certain sets of 2X2 matrices, we determine the smallest sets closed under multiplication containing the original sets.
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2. Let J=[■(0&1@1&0)].
(a) What is the smallest set which contains J and which is closed under matrix multiplication?
The smallest such set is S = {I, J}. To see this, note that J2 = I, so I needs to belong to ...
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