Conjugate Relations and Weak Subdifferentials of Relations. - Hidefumi Kawasaki (Math. Oper. Res., 1981)

A Duality Theorem in Multiobjective Nonlinear Programming. - Hidefumi Kawasaki (Math. Oper. Res., 1982)

An envelope-like effect of infinitely many inequality constraints on second-order necessary conditions for minimization problems. - Hidefumi Kawasaki (Math. Program., 1988)

The upper and lower second order directional derivatives of a sup-type function. - Hidefumi Kawasaki (Math. Program., 1988)

Second order necessary optimality conditions for minimizing a sup-type function. - Hidefumi Kawasaki (Math. Program., 1991)

Legendre-type optimality conditions for a variational problem with inequality state constraints. - Sayuri Koga; Hidefumi Kawasaki (Math. Program., 1999)

Conjugate Points for Variational Problems with Equality and Inequality State Constraints. - Hidefumi Kawasaki; Vera Zeidan (SIAM J. Control. Optim., 2000)

A conjugate point theory for nonlinear programming problems. - Hidefumi Kawasaki (CDC, 2001)

Conjugate points for calculus of variations with inequality state constraints. - Hidefumi Kawasaki; Vera Zeidan (CDC, 2001)

A Conjugate Points Theory for a Nonlinear Programming Problem. - Hidefumi Kawasaki (SIAM J. Control. Optim., 2001)

Analysis of conjugate points for constant tridiagonal Hesse matrices of a class of extremal problems. - Hidefumi Kawasaki (Optim. Methods Softw., 2003)

An Application of a discrete Fixed Point Theorem to a Game in Expansive Form. - Hidefumi Kawasaki; Akifumi Kira; Shinpei Kira (Asia Pac. J. Oper. Res., 2013)