analysis hyperreals '' gentle introduction hurd ae loeb pa ''an introduction nonstandard real analysis'' london academic press keisler h jerome '' http wwwmathwiscedu keisler calchtml elementary calculus approach using infinitesimals '' includes axiomatic treatment hyperreals freely available creative commons license keisler h jerome '' https booksgooglecom bookshl en lr id azlucqaaqbaj oi fnd pg pr dq infinitesimal approach stochastic analysis ots zmh gruyri sig cdhoththqfnqcd ps uyfoafe v onepage q infinitesimal approach stochastic analysis f false infinitesimal approach stochastic analysis '' vol memoirs american mathematical society naranong '' https webarchiveorg web http wwwmathtamuedu saichu nonstandardhtml nonstandard analysis model theoretic perspective '' streamlined introduction spirit robinson robinson nonstandard analysis nederl akad wetensch proc ser indag math
Formal science Mathematics Pure mathematics Analysis Non-standard analysis