1832 yilda "guruh" tushunchasini qo'llagan Jarov (1811 ~ 1832) radikal ko'pli sonli tenglamalarni yechish imkoniyatini to'liq hal qildi. U "guruh" tushunchasini birinchi bor taklif qilgan va odatda uni "guruh" asoschisi deb atashadi. U algebrani algebraik tenglamalarni yechish fani sifatida algebraik operatsiyalarni o'rganish faniga aylantirdi, ya'ni algebraik matematikani dastlabki algebraik davrdan abstrakt algebraga olib keldi.
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