英语词汇“direct sum”的意思、释义、用法解释及翻译-春雷网

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词汇	direct sum
释义	Definition of direct sum in English: direct sum noun Mathematics A set regarded formally as the sum of sets X₁,…,Xₙ, consisting of ordered n-tuples (x₁,…,xₙ), where xi ∈ Xi, and distinguished from a direct product only in the case of an infinite number of sets, the direct sum consisting only of sequences containing a finite number of non-zero elements. Origin Early 20th century; earliest use found in Proceedings of the London Mathematical Society. Definition of direct sum in US English: direct sum noun Mathematics A set regarded formally as the sum of sets X₁,…,Xₙ, consisting of ordered n-tuples (x₁,…,xₙ), where xi ∈ Xi, and distinguished from a direct product only in the case of an infinite number of sets, the direct sum consisting only of sequences containing a finite number of non-zero elements. Origin Early 20th century; earliest use found in Proceedings of the London Mathematical Society.
随便看	usefulness usefulness usefulnesses useful weight use gestures to indicate use immunity use inexpertly use inheritance use in place of use in preference to use instead of useless use less useless article uselessly uselessly uselessness uselessness uselessnesses Useless Parliament use-life use loaf use-man use-money usen

　

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