Har ila yau, a karo na farko, an bincika iyakokin ilmin lissafi. Niels Henrik Abel, ɗan ƙasar Norway, da Évariste Galois, ɗan Faransa, sun tabbatar da cewa babu wata hanyar algebraic ta gaba ɗaya don warware daidaitattun polynomial na digiri mafi girma fiye da huɗu (Abel <unk> Ruffini ka'idar). Sauran masana lissafi na ƙarni na 19 sun yi amfani da wannan a cikin hujjojin da suka nuna cewa madaidaiciya da kamfas kadai ba su isa su yanke kusurwa ba, don gina gefen cube sau biyu girman da aka bayar, ko don gina murabba'i mai daidai a yankin da aka bayar da da'irar. Masana lissafi sun yi ƙoƙari su warware duk waɗannan matsalolin tun zamanin tsohuwar Helenawa. A gefe guda, an wuce iyakance lambobi uku a cikin lissafi a cikin karni na 19 ta hanyar la'akari da sararin samaniya da sigogi masu rikitarwa? Tambaya: Menene masana lissafi suka yi ƙoƙari ba tare da nasara ba?
don magance duk wadannan matsaloli