644KiB, 1536x2304, 1610501123937.jpg View SameGoogleiqdbSauceNAO Anonymous Sat 16 Jan 22:35:43 2021 No.12589927 ViewReplyOriginalReport Quoted By: >>12590090 https://www.math.wisc.edu/~keisler/keislercalc-11-29-20.pdf Is this a good book to learn calculus from? It uses hyperreals and infinitesimals.