@erou À part ton premier exemple avec les fonctions à valeur réelle, tout me parait limpide, merci.
Prochaine étape, le théorème d'incomplétude :)
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@nzau
Mon francais est terrible, mais check:
https://en.wikipedia.org/wiki/Continuum_hypothesis
In mathematics, the continuum hypothesis (abbreviated CH) is a hypothesis about the possible sizes of infinite sets. It states:
There is no set whose cardinality is strictly between that of the integers and the real numbers.
And it is undecidable, so we take it axiomatically to be true.
