Linear endomorphism

Projection operator

A projection operator is an Idempotent linear endomorphism, i.e. an operator whose restriction to its image is the identity. #m/def/linalg

The geometric intuition is that a projection operator projects vectors into the subspace .

Properties

• In bra-ket notation the projection operator onto the space spanned by normalized is .

#state/tidy | #lang/en | #SemBr