Main idea The main idea of finitistic mathematics is not accepting the existence of infinite objects such as infinite sets. While all natural numbers are accepted as existing, the set of all natural numbers is not considered to exist as a mathematical object. Therefore quantification over infinite domains is not considered meaningful. The mathematical theory often associated with finitism is Thoralf Skolem's primitive recursive arithmetic.
MaIN Idea tHe mAiN IDeA of fiNITIstIc mAthematiCS is not aCcEPtinG tHE exisTeNce of iNFiNite objeCtS sUCh aS INfINite setS. whILe aLL naturAL numBeRS ARe aCcEpTEd AS existing, The set of all NaTuRal numbers is not coNsiDERed TO exist as A mathemaTiCAl object. ThErEFoRE quantifIcAtion over InFiNiTe domains Is not cOnsIDeRed meaNingful. The maThEmaTICal theOry OftEn assOciATED witH FIniTIsm is thoralF sKolem'S pRIMItIvE reCursiVe arithmeTIc.