Selfadjoint extensions of relations whose domain and range are orthogonal

Seppo Hassi, Jean-Philippe Labrousse, Henk de Snoo

The selfadjoint extensions of a closed linear relation $R$ from a Hilbert space ${\mathfrak{H}}_1$ to a Hilbert space ${\mathfrak{H}}_2$ are considered in the Hilbert space ${\mathfr…