简介：TwoArmijo-typelinesearchesareproposedinthispaperfornonlinearconjugategradientmethods.ThetwoArmijo-typelinesearchesareshowntoguaranteetheglobalconvergenceoftheDYmethodfortheunconstrainedminimizationofnonconvexdifferentiablefunctions.Further,ifthefunctionisstrictlyconvex,thetwoArmijo-typelinesearchesandanotherArmijo-typelinesearcharealsoshowntoguaranteetheconvergenceoftheDYmethod.
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