hyperreal number

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hyperreal number

n
(Mathematics) any of the set of numbers formed by the addition of infinite numbers and infinitesimal numbers to the set of real numbers
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References in periodicals archive
We are in possession of a well-developed mathematical theory of the so called hyperreal numbers, numbers that can be infinitely large or infinitesimally small.
Infinite ethics
"Higher Trigonometry, Hyperreal Numbers, and Euler's Analysis of Infinities." Mathematics Magazine 74.5 (2001): 339-68.
The Imaginative Mathematics of Bloch's Unimaginable Mathematics of Borges's Library of Babel
The real line is a subset of the hyperreal line; that is, each real number belongs to the set of hyperreal numbers. Surrounding each real number r, we introduce a collection of hyperreal numbers infinitely close to r.
The unimagined: catalogues and the Book of Sand in the Library of Babel
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