Explore BrainMass

Explore BrainMass

    Linear Algebra : Invertible Matrices

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Let A be the real 2x2 matrix
    [a b]
    [c d]

    with bc greater than or equal to 0. Prove there exists a real 2x2 invertible matrix S so that S^-1 A S is either diagonal or of the form
    [x 1]
    [0 x]
    where x is the eigenvalue of A.

    © BrainMass Inc. brainmass.com March 4, 2021, 6:08 pm ad1c9bdddf

    Solution Preview

    Please see the attachment.

    First, we set . We consider the following cases.
    1. . Without loss of generality, we can assume . Let . Since . If , then has two distinct zero points and . If , then we note , , . According to the ...

    Solution Summary

    The link between invertibility of matrices and eigenvalues is investigated. The solution is detailed and well presented. The response received a rating of "5" from the student who posted the question.