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See also:
\
[U+005C REVERSE SOLIDUS]
∖
U+2216
,
∖
SET MINUS
←
∕
[U+2215]
Mathematical Operators
∗
→
[U+2217]
Translingual
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Symbol
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∖
(
set theory
)
set difference
{ 4, 1, 5, 3 }
∖
{ 3, 1, 9 } = { 4, 5 }
Coordinate terms
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∩
,
∪