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proving with modulus on both sides

Guest cipher
Guest cipher
in Linear Algebra and Group Theory

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how do i show that |AB| = |A||B| ?

Well, in words it would be that since lABl equals the positive value of A times B, then lAl times lBl would be the same. The absolute value for both would be a positive number and since a positve times a positive is a positive, it would be the positive value of A times B. Don't know if that's what you're looking for, probably not. It's not really a mathematical proof, but it's what came to mind first.

thanx, though it was not quite what i was looking for it does make a lot of sense.

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