A least-squares mixed finite element methods for the first-order system formulation of second-order elliptic problems and a formulation for the infinite boundary conditions are presented.

研究了无穷边界的二阶椭圆问题，探讨了将其转化为一阶系统的最小二乘有限元逼近方法。

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However, there is no such error in the first HIS system because there it is performed in the proper order.

但是，第一个HIS系统中不会出现这种错误，因为它在第一个HIS系统中是按正确顺序执行的。

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The bill paves the way for a referendum on changing the Westminster electoral system from first-past-the-post to the Alternative Vote (AV) system, whereby voters rank candidates in order of preference on the ballot paper.

BBC: Parliamentary Voting System Bill part two