Minimal Key Calculator

[Gerald H]

(03-13-2015 11:26 AM)PANAMATIK Wrote:  

(03-13-2015 11:14 AM)Paul Dale Wrote:  The way the question is posed "least number of keys" would imply a minimum of two keys and disallow none or one. In this case two keys are clearly enough -- the morse code key and a power button

- Pauli

Don't be overhasty. Perhaps some mathematician will show a solution with a negative number of keys. Might be useful for entering imaginary numbers. Is minus infinity keys less than zero keys?

Bernhard

No, no, this is stretching things too far.

As clarification, in this & any other issues I may raise, answers must be limited to real rationals, or if you like Diophantine.