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单词
direct sum
释义
WordReference Random House Unabridged Dictionary of American English © 2024
direct
′
sum
′
,
[
Math.
]
Mathematics
a composition of two disjoint sets, as vector spaces, such that every element in the composition can be written uniquely as the sum of two elements, one from each of the given sets.
1925–30
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更新时间:2026/8/8 18:25:03