Chen Xiao-ling, Wu Liu-chan. Anti-periodic Solutions for the First Order Nonlinear Evolution Equations in Hilbert Space[J]. 2014, 31(4): 74-78.DOI: 10.3969/j.issn.1007-7162.2014.04.014.
It gave a new proof method of Alain Haraux’s theorem which was obtained by studying anti-periodic solutions to some nonlinear evolution equations in 1989. Then
it studied the existence and uniqueness of anti-periodic solutions for a class of the first order semilinear evolution equation.