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On Titchmarsh-Weyl functions of first-order symmetric systems with arbitrary deficiency indices
First-order symmetric system decomposing boundary triplet Nevanlinna boundary conditions m-function
2012/6/19
We study general (not necessarily Hamiltonian) first-order symmetric systems $J y'(t)-B(t)y(t)=\D(t) f(t)$ on an interval $[a,b> $ with the regular endpoint $a$. The deficiency indices $n_\pm$ of the ...
Some geometrical results about the convex deficiency of a compact set
convex deficiency visibility
2010/9/10
The convex deficiency has been recently used to characterize the convex kernel of a set. This kind of result, central for Visibility Theory, suggests to study the convex deficiency in terms of some Vi...