I gave up. 

How can I persuade Fricas to please print a _numerical_ value for say 
Gamma[2,3] ?   What is the magic trick? 

in Mathematica, I just add "N"

In[33]:= N[Gamma[5,2]]
Out[33]= 22.7363

I tried

(16) -> Gamma(5.0,2.0)     
   (16)  Gamma(5.0,2.0)
                                                      Type: 
Expression(Float)

and

Gamma(5.0,2.0)::Float 
   Cannot convert the value from type Expression(Float) to Float .

and

eval(Gamma(5.0,2.0)) 
   (17)  Gamma(5.0,2.0)
                                                      Type: 
Expression(Float)

This is so frustrating. It works on the one argument Gamma

(18) -> Gamma(5.0)                             
   (18)  23.9999999999_9999999999_99998
                                                                  Type: 
Float

But not on the 2 argument Gamma
)display op Gamma

[2] (D1,D1) -> D1 from FunctionalSpecialFunction(D2,D1)
            if D2 has Join(COMPAR,INTDOM) and D1 has FS(D2)

Thank you
--Nasser





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