James Okoye Chukuka Ezeilo, Nigerian mathematician (Nanka, Anambra State 17 January 1930 – Lagos 04 January 2013)

Authored over 90 papers

Pioneer in the use of Leray-Schauder degree type method to obtain existence results for periodic solutions of ordinary differential equations

Eponym of Ezeilo constant

SOME CONTRIBUTIONS

Uniqueness theorems for periodic solutions of certain fourth and fifth order differential systems. J. Nigerian Math. Soc. 2:55-9, 1983

An instability theorem for a certain sixth order differential equation. J. Austral. Math. Soc. Ser. A 32 (1):129-133, 1982

A further instability theorem for a certain fifth-order differential equation. Math. Proc. Cambridge Philos. Soc. 86 (3):491-3, 1979.

Instability theorems for certain fifth-order differential equations . Math. Proc. Cambridge Philos. Soc. 84 (2):343-50, 1978

An instability theorem for a certain fourth order differential equation . Bull. London Math. Soc. 10 (2):184-5, 1978

Some new criteria for the existence of periodic solutions of a certain second order differential equation . Atti Accad. Naz. Lincei Rend. Cl. Sci. Fis. Mat. Natur. (8) 56 (5), 675-83, 1974

With H.O. Tejumola. Boundedness theorems for certain third order differential equations . Atti Accad. Naz. Lincei Rend. Cl. Sci. Fis. Mat. Natur. (8) 55 (1973), 194-201 (1974).

A boundedness theorem for a certain nth order differential equation . Ann. Mat. Pura Appl. (4) 88:135-42, 1973

A boundedness theorem for a certain fourth order differential equation . J. London Math. Soc. (2) 5:376-84, 1972.

With H. O. Tejumola. Boundedness theorems for some fourth order differential equations . Ann. Mat. Pura Appl. (4) 89:259-75, 1971

With H. O. Tejumola. A boundedness theorem for a certain fourth order differential equation . Ann. Mat. Pura Appl. (4) 88:207-16, 1971

A generalization of a theorem of Reissig for a certain third order different equation . Ann. Mat. Pura Appl. (4) 87:349-56, 1970

A generalization of a boundedness theorem for a certain third-order differential equation Proc. Cambridge Philos. Soc. 63:735-42, 1967

Corrigendum: A boundedness theorem for a certain third-order differential equation . Proc. London Math. Soc. (3) 17:382-4, 1967

A boundedness theorem for some non-linear differential equations of the third order. J. London Math. Soc. 37:469-74, 1972

A boundedness theorem for a differential equation of the third order 1963

A boundedness theorem for a certain third-order differential equation. Proc. London Math. Soc. (3) 13: 99-124, 1963

On the existence of periodic solutions of a certain third-order differential equation. Proc. Cambridge Philos. Soc. 56:381-9, 1960