系统的哈密顿函数是作为矩阵微分算子的狄拉克算子，它不是半有界的。

The Hamiltonian of the system is the Driac operator which as a matrix differential operator is not semibounded from below.

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本文提供了在没有非奇异假设的条件下，求解有界约束半光滑方程组的投影信赖域算法。

In this paper, we propose a projected trust-region algorithm for solving bound-constrained smooth systems of equations.

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利用不动点理论，给出了一类半线性微分方程有界的调和伪概周期解存在的充分条件。

Using fixed point theorems, in this paper we give sufficient conditions of the existence of bounded mild pseudo almost periodic solution for some semilinear differential equations.

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