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Re: new functional operator

> An unfortunate choice of notation, \[Del], for that operator. After all
> \[Del] is a universal notation for grad, the gradient operator.

Yes, you are right of course, but  \[Del] beside \[PlusMinus] and \
[MinusPlus] are the only prefix operators without predefined meaning/
function in Mathematica.
Every other prefix operator would need Unprotect[ ].


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