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Decay of the error ΔE(n, l = 0) as a function of the parameter a, computed with an ANC potential (blue lines) and with a potential V(a, b = 0, r) that does not satisfy the norm conservation condition. The top blue line corresponds to n = 2 and the bottom blue line to n = 4. The order of the red lines is similar. The blue and red dotted lines show the decay of a function ∝1/a5.5 and ∝1/a3 respectively.
