04-127 Taksu Cheon and Pavel Exner
An approximation to delta' couplings on graphs (26K, LaTeX) Apr 23, 04
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Abstract. We discuss a general parametrization for vertices of quantum graphs and show, in particular, how the delta'_s and delta' coupling at an n edge vertex can be approximated by means of n+1 couplings of the delta type provided the latter are properly scaled.

Files: 04-127.tex