POCHHAMMER _ _ _ _ _ _ _ _ _ _ _ _ operator
The Pochhammer operator implements the Pochhammer notation (shifted factorial).
pochhammer(17,4); 116280 pochhammer(1/2,z); factorial(2*z) -------------------- 2*z (2 *factorial(z))
A number of complex rules for Pochhammer are inactive, be cause they cause a huge system load in algebraic mode. If one wants to use more rules for the simplification of Pochhammer's notation, one can do:
let special!*pochhammer!*rules;