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Hyperreal number
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== External links == * Crowell, ''[http://www.lightandmatter.com/calc/ Brief Calculus]''. A text using infinitesimals. * Hermoso, ''[http://mathforum.org/dr.math/faq/analysis_hyperreals.html Nonstandard Analysis and the Hyperreals]''. A gentle introduction. * Keisler, ''[http://www.math.wisc.edu/~keisler/calc.html Elementary Calculus: An Approach Using Infinitesimals]''. Includes an axiomatic treatment of the hyperreals, and is freely available under a Creative Commons license {{Number systems}} {{Infinitesimals}} {{DEFAULTSORT:Hyperreal Number}} [[Category:Mathematical analysis]] [[Category:Nonstandard analysis]] [[Category:Field (mathematics)]] [[Category:Real closed field]] [[Category:Infinity]] [[Category:Mathematics of infinitesimals]] [[Category:Numbers]]
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