名词
中文翻译：正定矩阵
同义词：
['positive definite matrix', 'positive definite matrix']
例句：
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1. In linear algebra, a positive semidefinite matrix is one that has all its eigenvalues greater than zero.
在线性代数中，正定矩阵是指所有特征值都大于零的矩阵。
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2. The positive semidefinite matrix was used to solve the system of equations.
这个正定矩阵被用来解这个方程组。
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3. The positive semidefinite matrix was used to find the minimum value of the function.
这个正定矩阵被用来找到函数的最小值。