Existence of periodic solutions under saddle point type conditions (JNCA)
Volume 1
Number 2
pp. 115-128

Existence of periodic solutions under saddle point type conditions
Norimichi Hirano and Naoki Shioji

Key words Mathematices Subject Classification
Evolution equations, maximal monotone operators, compact semigroups, periodic solutions, degree theory Primary 47H06, 47H17, 47H20, 35B10

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