I would love some guidance on how I should approach this question: Question: If A is an idempotent matrix of order n, show that
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Originally Posted by sparky I would love some guidance on how I should approach this question: Question: If A is an idempotent matrix of order n, show that Hints: 1) Show that ; 2) As I, A commute with each other, ... Tonio
Thank you for your reply Tonio. I am still trying to figure out how to show in your first point. Here is what I understand so far: A matrix is said to be idempotent if
Originally Posted by sparky Thank you for your reply Tonio. I am still trying to figure out how to show in your first point. Here is what I understand so far: A matrix is said to be idempotent if Well, understanding definitions is important but it's hardly enough for this problem... Further hint: Newton's Binomial Theorem: For any pair of commuting elements a,b in a ring and for any natural n, we have that Tonio
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