简介:Wediscusstheexistenceresultsoftheparabolicevolutionequationd(x(t)+g(t,x(t)))/dt+A(t)x(t)=f(t,x(t))inBanachspaces,whereA(t)generatesanevolutionsystemandfunctionsf,garecontinuous.Wegetthetheoremofexistenceofamildsolution,thetheoremofexistenceanduniquenessofamildsolutionandthetheoremofexistenceanduniquenessofanS-classieal(semi-classical)solution.Weextendthecaseswheng(t)=0orA(t)=A.