I was bored and found a HP27S

06102014, 07:19 PM
Post: #14




RE: I was bored and found a HP27S
(06102014 04:06 PM)Thomas Radtke Wrote:(06102014 03:52 PM)Katie Wasserman Wrote: Pretty amazing for a "nonprogrammable" calculator.It is programmable, the solver is just not turing complete. Calculators like the 20S play in the same league, allthough not as obvious. "not Turing Complete", I think not! Since no calculator has an infinite memory you could say this about all of them. It's been a while since I was in grad school for this but I'm pretty sure that the solver can compute anything that a Turning machine can given enough memory. You might say that the solver has no ability to halt when looping, but it can simulate that. katie 

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