Question: Has these definitions been updated or changed for 2018 version

Well I also come to think of it, disagree with calling the double factorial function the double factorial function, i would have thought bi-factorial to be better. or singular parity factorial function. 


But my interface (2016)  queries me everytime i enter "n!!" as to whether I am referring to the double factorial function or the application of the factorial twice in iteration, ie :  (n!)!

I just think this was a bad decision to make common place and the notation cabal need to review and change this. 

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