Numerical analysis of a family of optimal distributed control problems   governed by an elliptic variational inequality
  The numerical analysis of a family of distributed mixed optimal control problems governed by elliptic variational inequalities (with parameter $\alpha >0$) is obtained through the finite element method when its parameter $h\rightarrow 0$. We also obtain the limit of the discrete optimal control and the associated state system solutions when $\alpha\rightarrow \infty$ (for each $h>0$) and a commutative diagram for two continuous and two discrete optimal control and its associated state system solutions is obtained when $h\rightarrow 0$ and $\alpha\rightarrow \infty$. Moreover, the double convergence is also obtained when $(h, \alpha)\rightarrow(0, \infty)$. 
Mariela C. Olguin and Domingo A. Tarzia
math.NA