little math puzzle. Map 1 0 -1 to 1 0.5 0

[Joe Horn]

(05-21-2018 06:13 PM)Dieter Wrote:  

(05-21-2018 05:34 PM)Joe Horn Wrote:  1 - NOT

Which calculator do you have in mind here?
I tried this on a 35s and it returns

  1 -> –1
  0 ->   0
–1 ->   1

Ah yes, models differ. 1 – NOT works in all RPL models.