Question: explain with proof 1 If P and P are orthogonal projections satisfying P P = P P, then P P is an orthogonal projection.

explain with proof 1 If P and P are orthogonal projections satisfying

explain with proof 1 If P and P are orthogonal projections satisfying P P = P P, then P P is an orthogonal projection. There exists an orthogonal 3 x 3 matrix which has exactly three entries of zero.

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Answer To prove the first statement lets consider two orthogonal projections P1 and P2 such that P1 ... View full answer

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