theorem

/ˈθɪərəm/ (bre, ipa) · /ˈθiːərəm/ (ame, ipa) · /ˈthē-ə-rəm ˈthir-əm/ (ame, mw)

theorem — 名詞

  • theoremsingular
  • theoremsplural

1. In mathematics and logic, a statement whose truth has been established by a vali

1.名詞C1
釋義

定理

經邏輯證明為真的數學命題

In mathematics and logic, a statement whose truth has been established by a valid chain of reasoning, working step by step from agreed-upon starting points (definitions and axioms) and previously proven results.

例句

Pythagoras proved his famous theorem about right-angled triangles more than two thousand years ago.

Pythagoras 在兩千多年前證明了關於直角三角形的著名定理。

proved + famous theorem + about [topic]

Every student in the advanced maths class had to prove the theorem using basic algebra.

高階數學課上的每個學生都必須用基礎代數證明同一個定理。

prove a theorem using [method]

同義詞
  • proposition

    A broader term for any statement put forward for consideration; a proposition becomes a theorem only after it has been proved.

  • lemma

    A minor theorem proved as a stepping stone toward a larger, more important theorem.

  • corollary

    A statement that follows directly from a theorem with little or no additional proof needed.

反義詞
  • conjecture

    A statement believed to be true but not yet proved; the opposite status of a theorem.

用法筆記

Used primarily in formal mathematics and logic contexts. A theorem is distinct from a hypothesis (an unproven guess) and an axiom (a starting assumption that is accepted without proof). Common verbs used with this sense include prove, state, apply, and demonstrate.

常見錯誤

Einstein's theory of relativity is just a theorem.
Einstein's theory of relativity is a scientific theory, not a theorem.
💡A scientific theory is a broad explanatory framework supported by evidence, while a theorem is a specific statement proved within a formal system such as mathematics.
The scientist made a theorem about the weather.
The scientist proposed a hypothesis about the weather.
💡Theorem is almost never used for natural or social sciences; use hypothesis or theory instead.