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Hi the following equation in my scriptum seems unclear. I think it has something to do with cauchy-product but i dont know


marked as duplicate by Hans Lundmark, steven gregory, eranreches, José Carlos Santos, Namaste Dec 18 '17 at 0:23

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  • $\begingroup$ i would guess you can derive it by differentiating a power series expansion of some known function. $\endgroup$ – mathreadler Dec 16 '17 at 14:08
  • $\begingroup$ @HansLundmark. Not exactly the same Q but close enough, to within a multiplication by $x$. $\endgroup$ – DanielWainfleet Dec 16 '17 at 17:28