Last Updated
：2025/11/29
surreal number
（ plural ）
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(mathematics) Any element of a field equivalent to the real numbers augmented with infinite and infinitesimal numbers (respectively larger and smaller (in absolute value) than any positive real number).
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surreal number
To understand infinitesimals and infinite magnitudes, mathematicians often construct a surreal number step by step using transfinite induction.
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To understand infinitesimals and infinite magnitudes, mathematicians often construct a surreal number step by step using transfinite induction.
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