@BOOK{ Book!D - 90120612, AUTHOR = " by Ivar Ekeland.", TITLE = "Convexity Methods in Hamiltonian Mechanics", LIBRARY= "مرکز و کتابخانه مطالعات اسلامی به زبان‌های اروپایی", SUBJECT = "Differential equations, Partial.,Mathematical optimization.,Mathematics.", URL = "/book/90120612/Convexity-Methods-in-Hamiltonian-Mechanics/"}