Dependence along of several functions with only one node and one maximum of density at .
Dependence along of several functions and of the corresponding densities for and one maximum of density at .
Evaluation along of several functions and of the corresponding densities for and two maxima of density at and .
Embedded nodes for successive value of l, with .
Convergence of vibronic energies with the number of basis functions for (a) the ZPE of , (b) the ZPE of , (c) the ZPE of HCCS, and (d) the second state of HCCS. corresponds to Legendre polynomials.
Convergence of the spin-orbit splitting for the fundamental vibronic state of (a) and (b) HCCS. It corresponds to the energy of the first from the first (ZPE equation).
Dependence of the obtained vibronic energies for the first four states of HCCS with the parameter for a given number (1360) of basis functions.
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