Geometric properties of the lowest energy state for a polynomial Hamiltonian. (English) Zbl 07905620
Denardo, G. (ed.) et al., Group theoretical methods in physics. Proceedings of the XIIth International Colloquium Held at the International Centre for Theoretical Physics, Trieste, Italy, September 5–11, 1983. Lect. Notes Phys. 201, 508-510 (1984).