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单词 TheSetOfAllRealTranscendentalNumbersIsUncountable
释义

the set of all real transcendental numbers is uncountable


Theorem.The set of all real transcendental numbers is uncountable.

Proof.Denote 𝕋 and 𝔸 be the set of real transcendental and real algebraic numbersMathworldPlanetmath respectively. Suppose 𝕋 is countableMathworldPlanetmath. Then the union 𝕋𝔸= is also countable, since 𝔸 is also countable, which is a contradictionMathworldPlanetmathPlanetmath. Therefore 𝕋 must be uncountable.

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更新时间:2025/6/16 14:09:14