Question: A projection is any transformation t such that t2 = t. (For instance, consider the transformation of the plane R2 projecting each vector onto its

A projection is any transformation t such that t2 = t. (For instance, consider the transformation of the plane R2 projecting each vector onto its first coordinate. If we project twice then we get the same result as if we project just once.) What is the minimal polynomial of a projection?

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