Chenna NasreddineSellami Badreddine2024-05-302024-05-302020-02-23Chenna, Nasreddine. Sellami Badreddine. Descent Propriety of the Convex Combination of FR and PRP Methods. International PluridisciplinaryPhD Meeting (IPPM’20). 1st Edition, February23-26, 2020. University Of Eloued. [Visited in ../../….]. Available from [copy the link here].https://dspace.univ-eloued.dz/handle/123456789/32807InterventionIn this note, we present a new theory as a modification and alternative to S.Djordjevic's Theorem (2.2) [5], Here we rephrase the text of theory (2.2) by deleting condition (2.16), notations and equation numbers as in S.Djordjevic.enunconstrained optimizationconjugate gradient methodglobal convergenceIntervention