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I


The double-struck capital letter I, I, is a symbol sometimes used instead of Z for the ring of integers. In contrast, the lower case symbol i is used to refer to the imaginary unit i=sqrt(-1).


See also

i, Z

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Cite this as:

Weisstein, Eric W. "I." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/I.html

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