All-derivable points in continuous nest algebras (Q2470480)

Let \(N\) be a continuous nest on a complex and separable Hilbert space \(H\). In the paper under review, the authors prove that if \(\{0\}\not= M\in N\), then the orthogonal projection operator \(P(M)\) is an all-derivable point of the nest algebra \(\operatorname{alg} N\) for the strong operator topology.