>>709
Karin U. Kat先生が、”A strict non-standard inequality .999... < 1”とか、いろいろと（8個の論文）書いておりますですｗ
読んでみたらぁ〜ｗ
はいよｗｗ（＾＾

（参考）
https://www.researchgate.net/scientific-contributions/14412636_Karin_U_Katz
Karin U. Katz's research while affiliated with Bar Ilan University and other places
(抜粋)
What makes a theory of infinitesimals useful? A view by Klein and Fraenkel
Article
Full-text available
Feb 2018
Vladimir Kanovei
Karin U. Katz
Mikhail G. Katz
Thomas Mormann
Felix Klein and Abraham Fraenkel each formulated a criterion for a theory of infinitesimals to be successful, in terms of the feasibility of implementation of the Mean Value Theorem. We explore the evolution of the idea over the past century, and the role of Abraham Robinson's framework therein.
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Cauchy, Infinitesimals and ghosts of departed quantifiers
Article
Full-text available
Dec 2017
Jacques Bair
Piotr Blaszczyk
Robert Ely[...]
David Sherry
Procedures relying on infinitesimals in Leibniz, Euler and Cauchy have been interpreted in both a Weierstrassian and Robinson's frameworks. The latter provides closer proxies for the procedures of the classical masters. Thus, Leibniz's distinction between assignable and inassignable numbers finds a proxy in the distinction between standard and nons...
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