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单词 identity element
释义
identity element
(once / 5909656 pages)
n

WORD FAMILY
identity element
USAGE EXAMPLES
Mathematicians call it the “identity element,” so I’ll denote it by the symbol I. Next come the three genuine ways to flip a mattress. 
New York Times(May 03, 2010)
We can summarize this property with the equation RR = I, where RR means do R twice, and I is the do-nothing identity element
New York Times(May 03, 2010)
n an operator that leaves unchanged the element on which it operates
Syn|Hyper
identity, identity operator
operator
(mathematics) a symbol or function representing a mathematical operation
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