TEOREMAI FERMA, 1) teoremai buzurgi ferma, teoremaest, ki halhoi butuni musbat nadoshtani muodilai Diofant (n — adadi butuni musbati az 2 kalon)-ro sobit mekunad. In teoremaro bori avval matematiki fransavi Ya. Ferma bayon kardaast. Holati khususii in teorema baroi baae qimathoi n sobit shuda boshad ham, isboti purrai on baroya n -i dilkhoh to hol malum nest. Khudi Ferma tasdiq namudaast, ki u isboti in teoremaro dar kitobash «Diofant — matematiki Yunoni Qadim» ovardani shudaast, vale hajmi kitob imkon nadodaast.
2) Teoremai khurdi Ferma, yake az teoremahoi nazariyai adadhost, ki muvofiqi on agar R adadi sodda va a adadi butuni ba R taqsimnashavanda boshad, on gah ba R hamesha taqsim meshavad, yane ast. Teoremaro P. Ferma bayon va L. Eyler isbot kardaast.