In Bessel's ODE [itex][/itex] [itex]x^{2}y''+xy''+(x^{2}-\nu^{2})y=0[/itex], why must [itex]\nu[/itex] not be less than zero?(adsbygoogle = window.adsbygoogle || []).push({});

I have looked it up, but I do not find a satisfying answer anywhere.

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# Bessel's ODE: Why does taking ν≥0 matter? It is squared anyway.

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