简介:<正>Inthispaper,weintroduceanewclassofergodicsequences,pseudoalmostperiodicsequences,andstudytheexistenceofpseudoalmostperiodicsequencestodifferenceequations.Onthebasisofthese,weinvestigatetheexistenceofpseudoalmostperiodicsolutionsforneutraldelaydifferentialequationswithpiecewiseconstantargument,d/(dt)(y(t)+py(t-1))=qy(2[(t+1)/2])+g(t,y(t),([t])).
简介:Wepresentsomeconditionsfortheexistenceanduniquenessofalmostautomorphicsolutionsofthirdorderneutraldelay-differentialequationswithpiecewiseconstantoftheform(x(t)+px(t-1))′′′=a0x([t])+a_1x([t-1])+f(t),where[·]isthegreatestintegerfunction,p,a0anda1arenonzeroconstants,andf(t)isalmostautomorphic.