Hi Artur,

If you don't need to round, i.e. your real number is already a whole number, you should just use the inverse of the function real or the function r2z as attached as this will simplify reasoning.

If you need to round, then there are various types of rounding. The attached gives you some suggestions. Note that the functions ceil, round and fix are all defined in terms of floor so that only one of the four has a non-constructive definition. There are lots of different ways of expressing these and everyone has their own preference...


Artur Oliveira Gomes wrote:
Hi there,

Does somebody knows how to round real numbers
in order to get a Z number using ProofPower?


Artur Oliveira Gomes

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