形容词
中文翻译：正定的
同义词：
['positive', 'affirmative']
例句：
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1. The positive semidefinite matrix is a key component of the linear programming problem.
正定半定矩阵是线性规划问题的关键组成部分。
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2. The positive semidefinite function has been proven to be useful for solving optimization problems.
正定函数已被证明对于解决优化问题非常有用。
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3. In this study, we found that the positive semidefinite matrices are more efficient in solving large-scale problems.
在这项研究中，我们发现正定半定矩阵在解决大规模问题上更高效。