Diabolical points in the spectra of triangles
‘Accidental’ degeneracies between energy levels E j and E j +1 of a real Hamiltonian can occur generically in a family of Hamiltonians labelled by at least two parameters X , Y ...
‘Accidental’ degeneracies between energy levels E j and E j +1 of a real Hamiltonian can occur generically in a family of Hamiltonians labelled by at least two parameters X , Y ...
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