ﺛﺎﺑﺖ ﺗﻮكشيدگي ﺑﻬﯿﻦ فضاهاي باناخ و مسئله ﺟﺎﺑﺠﺎﺷﺪﮔﯽ ﮐﻤﯿﻦ

Lipschitzian mapping , ‎Minimal displacement , ‎Retraction constant , ‎ ‎Optimal retraction

Optimal retraction constant an​d minimal displacement of Banach spaces