9 citations · 21 across the 11 of their papers we have counts for
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math.FA2017
The Dirichlet-to-Neumann operator for divergence form problems
A. F. M. ter Elst, G. Gordon, M. Waurick
We present a way of defining the Dirichlet-to-Neumann operator on general Hilbert spaces using a pair of operators for which each one's adjoint is formally the negative of the othe…
math.FA2016★ 1 cited
Weak and strong approximation of semigroups on Hilbert spaces
R. Chill, A. F. M. ter Elst
For a sequence of uniformly bounded, degenerate semigroups on a Hilbert space, we compare various types of convergences to a limit semigroup. Among others, we show that convergence…