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Question: How many arguments does a proc take?

Question:How many arguments does a proc take?

Rouben Rostamian 8028 Maple 2022
parameters procedure
December 26 2022
2
 
> 

restart;
> 

q := (u,v) -> u^2 + v^2;

proc (u, v) options operator, arrow; v^2+u^2 end proc

> 

D[3](q);

Error, (in D/procedure) index out of range: function takes only 2 arguments

Question: How does D know that q takes two arguments?

In general, if I pass q to another proc, how can I find out, within
that proc, that q takes only two arguments?

download number-of-arguments.mw
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