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Date: 3-6-2019
2518
Date: 20-8-2018
1900
Date: 12-10-2018
1712
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The identity function is the function which assigns every real number to the same real number . It is identical to the identity map.
The identity function is trivially idempotent, i.e., .
The identity function in the complex plane is illustrated above.
A function that approximates the identity function for small to terms of order is given by
(OEIS A115183 and A115184). This function leads to some nice pi approximations.
REFERENCES:
Sloane, N. J. A. Sequences A115183 and A115184 in "The On-Line Encyclopedia of Integer Sequences."
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