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AsIseeit，thegraduatecourseinalgebramustprimarilypreparestudentstohandlethealgebrawhichtheywillmeetinallofmathematics：topology，partialdifferentialequations，differentialgeometry，algebraicgeometry，analysis，andrepresentationtheory，nottospeakofalgebraitselfandalgebraicnumbertheorywithallitsramifications.HenceIhaveinsertedthroughoutreferencestopapersandbookswhichhaveappearedduringthelastdecades，toindicatesomeofthedirectionsinwhichthealgebraicfoundationsprovidedbythisbookareused;Ihaveaccompaniedthesereferenceswithsomemotivatingcomments，toexplainhowthetopicsofthepresentbookfitintothemathematicsthatistocomesubsequentlyinvariousfields;andIhavealsomentionedsomeunsolvedproblemsofmathematicsinalgebraandnumbertheory.Theabcconjectureisperhapsthemostspectacularofthese.