定理

• 読み: ていり
• ローマ字: teiri
• 漢字の分解: 定 (tei) — fix, establish, decide; 理 (ri) — reason, principle, logic
• 発音: /teː.ɾi/

意味

Theorem; a mathematical or logical proposition that has been proven to be true.

A noun used primarily in mathematics and logic to refer to a statement that has been rigorously proven. Well-known examples include ピタゴラスの定理 (Pythagorean theorem) and フェルマーの最終定理 (Fermat's Last Theorem). Distinguished from 定義 (definition) and 公理 (axiom). Typically encountered in academic and educational contexts.

例文

1. ピタゴラスの定理は中学校で習う基本的な数学だ。
2. この定理を使えば問題がもっと簡単に解ける。
3. 数学者たちはその定理の証明に何年もかけた。

使い方ガイド

場面: mathematics, education, science, logic

トーン: academic

起源と歴史

From Sino-Japanese 定 (tei, to fix/establish) + 理 (ri, reason/principle). Literally 'an established principle,' reflecting a truth that has been fixed through logical proof.

文化的背景

時代: Modern

世代: Students and academics

社会的背景: Educated