SECOND-ORDER OPTIMALITY CONDITIONS FOR OPTIMAL CONTROL PROBLEMS GOVERNED BY 3-DIMENSIONAL NEVIER-STOKES EQUATIONS

2006 ◽  
Vol 26 (4) ◽  
pp. 729-734 ◽  
Author(s):  
Lijuan Wang ◽  
Peijie He
Author(s):  
Hanbing Liu ◽  
Gengsheng Wang

In this paper, we study second-order optimality conditions for some optimal control problems governed by some semi-linear parabolic equations with periodic state constraint in time. We obtain a necessary condition and a sufficient condition in terms of the second order derivative of the associated Lagrangian. These two conditions  correspond  to the positive definite and the nonnegativity of the second order derivative of the Lagrangian on the same cone, respectively.


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