Abstract
In physics and chemistry the Born-Oppenheimer approximation is a very important method for analyzing the spectrum of molecules1). It is based on the important fact that the molecular Schrödinger operator contains one small parameter, the ratio k4 of the electronic to the nuclear mass2). Perturbation theory in this parameter is however very singular.
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© 1981 Plenum Press, New York
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Combes, J.M., Duclos, P., Seiler, R. (1981). The Born-Oppenheimer Approximation. In: Velo, G., Wightman, A.S. (eds) Rigorous Atomic and Molecular Physics. NATO Advanced Study Institutes Series, vol 74. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3350-0_5
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