Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Ana iya cewa lissafin bambancin ya fara ne da matsalar ƙarancin juriya ta Newton a cikin 1687, wanda ya biyo bayan matsalar karkatar brachistochrone da Johann Bernoulli ya ɗaga (1696). Nan da nan ya kama hankalin Jakob Bernoulli da Marquis de l'Hôpital, amma Leonhard Euler ya fara yin bayani game da batun, farawa a 1733. Lagrange ya rinjayi aikin Euler don ba da gudummawa sosai ga ka'idar. Bayan Euler ya ga aikin 1755 na Lagrange mai shekaru 19, Euler ya watsar da nasa tsarin lissafi na musamman don son tsarin nazarin Lagrange kuma ya sake sunan batun lissafin bambancin a cikin lacca na 1756 Elementa Calculi Variationum. Legendre (1786) ya tsara hanya, ba cikakke ba, don bambancin iyakar da mafi ƙarancin. Isaac Newton da Gottfried Leibniz suma sun ba da hankali sosai ga batun. Ga wannan nuna bambanci Vincenzo Brunacci (1810), Carl Friedrich Gauss (1829), Siméon Poisson (1831), Mikhail Ostrogradsky (1834), da kuma Carl Jacobi (1837) sun kasance daga cikin masu ba da gudummawa. Wani muhimmin aiki na yau da kullun shine na Sarrus (1842) wanda Cauchy ya taƙaita shi kuma ya inganta shi (1844). Sauran litattafai masu mahimmanci da abubuwan tunawa sun rubuta Strauch (1849), Jellett (1850), Otto Hesse (1857), Alfred Clebsch (1858), da Carll (1885), amma wataƙila mafi mahimmancin aikin ƙarni shine na Weierstrass. Hanyar da ya shahara a kan ka'idar tana da mahimmanci, kuma ana iya tabbatar da cewa shi ne na farko da ya sanya shi a kan tushe mai ƙarfi da wanda ba za a iya shakkarsa ba. Matsalolin Hilbert na 20 da na 23 da aka buga a 1900 sun ƙarfafa ci gaba. A cikin karni na 20 David Hilbert, Emmy Noether, Leonida Tonelli, Henri Lebesgue da Jacques Hadamard da sauransu sun ba da gudummawa mai mahimmanci. Marston Morse ya yi amfani da lissafi na bambance-bambance a cikin abin da yanzu ake kira ka'idar Morse. Lev Pontryagin, Ralph Rockafellar da F. H. Clarke sun haɓaka sabbin kayan aikin lissafi don lissafin bambance-bambance a cikin ka'idar sarrafawa mafi kyau. Shirye-shiryen motsa jiki na Richard Bellman shine...  Tambaya: Menene sunan ka'idar da Alfred Clebsch ya sanya a kan kamfaninsa?
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