Abel had shown when certain elliptic differentials could be integrated in logarithms but his methods was of little practical use. Zolotarev was able to give a much more effective solution.
Abel ay ipinapakita kapag ang tiyak na tambilugin differentials ay maaaring integrated sa logarithms ngunit ang kanyang mga pamamaraan ay kaunti ng mga praktikal na gamitin. Zolotarev ay able sa magbigay ng isang mas epektibong solusyon.