Re: mixed second derivatives

["Carl E. Mungan" <mungan@USNA.EDU>]

Jack wrote:

> [(d/dy),(d/dx)] = (y''/(y')^2)(d/dx)  Did I slip up somewhere?

Looks fine to me.

>         Now why do these look like elements of a Lie algebra?

Provided the elements of the algebra are operators. My memory of Lie
algebras is rather rusty.

>   Does
> this have anything to do with topics treated in Ince <Differential
> Equations>?

I'm taking that he's the author of a well-known text. Unfortunately I
don't have a copy of it. -C
--
Carl E. Mungan, Asst. Prof. of Physics  410-293-6680 (O) -3729 (F)
      U.S. Naval Academy, Stop 9C, Annapolis, MD 21402-5040
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