Recent content by arnaldur

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    Undergrad Are these statements TRUE or FALSE and why?

    Regarding the first question. To be able to factor the left side you must have +2I, so you have to add 4I to both sides to get (A-I)(A-2I)=4I. If you then take the determinant you get det(A-I)det(A-2I)=4, so (A-I) and (A-2I) must be invertible.
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    Graduate Analysis of A-Module Endomorphism \phi: Understanding Kronecker Delta Function

    The equation you quote from the book, is correct but the term within parenthesis is a mapping which is applied to xj instead of multiplying it. The aij part is actually aij times the identity map.