2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93348The extent to which a given wave function, $ψ$, is entangled is measured by minimizing the norm of $ψ$ minus all possible unentangled functions. This measure is given by the largest eigenvalue of $ψ^\dagger ψ$, considered as an operator. The definition is basis independent.4 pages, plain TeX, no figuresQuantum Physicstext