2. (a). Prove that the sum of the two projection operators is not a projection operator,...

2. (a). Prove that the sum of the two projection operators is not a projection operator, unless the multiplication of the two projection operators produces a zero value.

(b). Prove that the result of the multiplication of two projection operators is not a projection operator, unless the two projection operators are hermitian.

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genius_generous answered 1 year ago

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