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One more book I found to be useful, at least for its introduction to the hyperreal number system: http://www.amazon.com/Infinitesimal-Calculus-Dover-Books-Mathe
by hga 12y ago
One more book I found to be useful, at least for its introduction to the hyperreal number system: http://www.amazon.com/Infinitesimal-Calculus-Dover-Books-Mathematics/dp/0486428869/ http://www.amazon.com/Infinitesimal-Calculus-Dover-Books-Mat... It's short and focused.