Delta potential

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Revision as of 14:16, 2 February 2014 by en>Wabber (recalculated everything myself and without that minus the conclusion in the next sentence about \lambda being negative doesn't make any sense. If \kappa was negative \psi would diverge.)
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Template:Infobox number 217 is the natural number following 216 and preceding 218.

217 is a centered hexagonal number, a 12-gonal number, a centered 36-gonal number, and a Blum integer.[1] It is both the sum of two positive cubes and the difference of two positive consecutive cubes in exactly one way: 217=63+13=9383. When written in binary, it is a non-repetitive Kaprekar number.[2]

See also

References

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Template:Integers

ca:Nombre 210#Nombres del 211 al 219