Abstract
A celebrated theorem due to R.F rucht states that, roughly speaking, each group is abstractly isomorphic to the symmetry group of some graph. By “symmetry group” the group of all graph automorphisms is meant. We provide an analogue of this result for quantum graphs, i.e., for Schrödinger equations on a metric graph, after suitably defining the notion of symmetry.
Mathematics Subject Classification (2000). Primary 05C25; Secondary 35B06, 81Q35.
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Mugnolo, D. (2012). A Frucht Theorem for Quantum Graphs. In: Arendt, W., Ball, J., Behrndt, J., Förster, KH., Mehrmann, V., Trunk, C. (eds) Spectral Theory, Mathematical System Theory, Evolution Equations, Differential and Difference Equations. Operator Theory: Advances and Applications, vol 221. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-0297-0_28
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DOI: https://doi.org/10.1007/978-3-0348-0297-0_28
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