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Defining a function from $ \mathbb {R}$p to $ \mathbb {R}$

For p = 1, e.g. for f  :  (x) $ \rightarrow$ x*sin(x), input :
Or :
Output :
If p > 1, e.g. for f  :  (x, y) $ \rightarrow$ x*sin(y), input :
Or :
Output :
Warning !!! the expression after -> is not evaluated. You should use unapply if you expect the second member to be evaluated before the function is defined.

giac documentation written by Renée De Graeve and Bernard Parisse