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单词
first species
释义
first species
first species
[
′fərst ′spē‚shēz
]
(mathematics)
The class of sets
G
0
such that one of the sets
G
n
is the null set, where, in general,
G
n
is the derived set of
G
n
-1
.
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seriphidium
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更新时间:2025/3/16 19:44:29