名词
中文翻译：外积
同义词：
['outer product', 'outer sum', 'outer product of a set']
例句：
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1.The outer product of the group is the sum of all its elements.
这个群的外积是所有元素的和。
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2.The outer product of a set of vectors is the sum of their magnitudes.
向量集的外积是它们模长的和。
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3.The outer product of two matrices is the determinant of their transpose.
两个矩阵的外积是它们的转置的行列式。