This paper considers the finite element approximation to parabolic optimal control problems with measure data in a nonconvex polygonal domain.Such problems usually possess low regularity in the state variable due to t...This paper considers the finite element approximation to parabolic optimal control problems with measure data in a nonconvex polygonal domain.Such problems usually possess low regularity in the state variable due to the presence of measure data and the nonconvex nature of the domain.The low regularity of the solution allows the finite element approximations to converge at lower orders.We prove the existence,uniqueness and regularity results for the solution to the control problem satisfying the first order optimality condition.For our error analysis we have used piecewise linear elements for the approximation of the state and co-state variables,whereas piecewise constant functions are employed to approximate the control variable.The temporal discretization is based on the implicit Euler scheme.We derive both a priori and a posteriori error bounds for the state,control and co-state variables.Numerical experiments are performed to validate the theoretical rates of convergence.展开更多
讨论多角形域上椭圆混合边值问题Δu=finΩ,u=0onΓ1, u n=0onΓ2,的正则性,这里边界Γ=Γ1+Γ2,且Γ1有正测度.若f∈L2(Ω),则解u∈Hρ(Ω),ρ=1+min(12α0,1β0)-ε,ε>0,其中α0π是Γ1与Γ2的所有交接点处的最大内角,而β0π是Γ...讨论多角形域上椭圆混合边值问题Δu=finΩ,u=0onΓ1, u n=0onΓ2,的正则性,这里边界Γ=Γ1+Γ2,且Γ1有正测度.若f∈L2(Ω),则解u∈Hρ(Ω),ρ=1+min(12α0,1β0)-ε,ε>0,其中α0π是Γ1与Γ2的所有交接点处的最大内角,而β0π是Γ1内或Γ2内角点处的最大内角.展开更多
文摘This paper considers the finite element approximation to parabolic optimal control problems with measure data in a nonconvex polygonal domain.Such problems usually possess low regularity in the state variable due to the presence of measure data and the nonconvex nature of the domain.The low regularity of the solution allows the finite element approximations to converge at lower orders.We prove the existence,uniqueness and regularity results for the solution to the control problem satisfying the first order optimality condition.For our error analysis we have used piecewise linear elements for the approximation of the state and co-state variables,whereas piecewise constant functions are employed to approximate the control variable.The temporal discretization is based on the implicit Euler scheme.We derive both a priori and a posteriori error bounds for the state,control and co-state variables.Numerical experiments are performed to validate the theoretical rates of convergence.
文摘讨论多角形域上椭圆混合边值问题Δu=finΩ,u=0onΓ1, u n=0onΓ2,的正则性,这里边界Γ=Γ1+Γ2,且Γ1有正测度.若f∈L2(Ω),则解u∈Hρ(Ω),ρ=1+min(12α0,1β0)-ε,ε>0,其中α0π是Γ1与Γ2的所有交接点处的最大内角,而β0π是Γ1内或Γ2内角点处的最大内角.
