A mixed method for a second-order elliptic problem based on a Lagrange multiplier. (Chinese. English summary) Zbl 1003.35048
Summary: Using the idea of the Lagrange multiplier method, we convert the classic mixed variational form for a second-order elliptic problem to an equivalent one. Depending on the new form, a discret scheme is constructed, which possesses not only less freedom but higher approximating order.
MSC:
35J25 | Boundary value problems for second-order elliptic equations |
35A25 | Other special methods applied to PDEs |