Hmmmm, am somehow unable to find where the transformation to the
SExpression below happens. Does that have to do with '%specialDisp?
But even then I could not find a special treatment for 'factorial.
Background of this question.
I actually wanted to tweak Format1D locally so that it prints
factorial(a) instead of a!. But obviously ยด'factorial is not a known
operator for OutputForm, so it is basically impossible to output
factorial differently.
Ralf
%%% (511) -> fa := factorial a
(511) a!
Type: Expression(Integer)
%%% (517) -> kfa := kernels(fa).1
(517) a!
Type: Kernel(Expression(Integer))
%%% (519) -> (kfa::OutputForm) pretend SExpression
(519) (CONCAT a !)
Type: SExpression
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