Cruthaigh has other meanings also. One of them is to prove.
Cruthaigh an teoirim = Prove the theorem.
This sentence is a bit awkward in English, maybe it has to do with the inherent telicity of "create" in English, but I don't think you'd see this verb in a present perfective sense like this. Maybe in a gnomic statement "I create nice things for you" but otherwise it would almost always be in a past tense or in the progressive.