…A model is a framework for interpreting formal theories, but there are nonstandard models for theories that satisfy certain conditions. These are called nonstandard models. Around 1960, A. Robinson considered the nonstandard model R * of the real number field R , introduced infinitesimal (and infinitesimal) hyperreal numbers, and was the first to succeed in rationalizing Leibnizian infinitesimal arithmetic. … *Some of the terminology that refers to "nonstandard model" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…モデルとは形式的な理論を解釈する枠組みであるが,一定の条件を満たす理論には標準的でないモデルが存在する。これを超準モデルnonstandard modelという。1960年ころ,ロビンソンA.Robinsonは実数体Rの超準モデルR*を考えて無限小(および無限大)超実数を導入し,ライプニッツ流の無限小演算を合理化することに初めて成功した。… ※「nonstandard model」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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