How do real analysts?
@dlakelan But the question is which number system with infinitesimals is your pick?
@internic
The answer is either IST, or Alpha Theory... either is great.
Alpha theory: https://www.sciencedirect.com/science/article/pii/S0723086903800385
IST: https://projecteuclid.org/journals/bulletin-of-the-american-mathematical-society/volume-83/issue-6/Internal-set-theory-A-new-approach-to-nonstandard-analysis/bams/1183539849.pdf
QOTO: Question Others to Teach Ourselves An inclusive, Academic Freedom, instance All cultures welcome. Hate speech and harassment strictly forbidden.
@internic
The answer is either IST, or Alpha Theory... either is great.