extended real number system

名词 n.
中文释义

英文释义

名词 n.
  1. The real number system adjoined with two extra symbols: ∞ and −∞, inheriting the ordering of the real number system, and defining −∞ to be less than any real number, and ∞ to be larger than any real number.

词形变化

real number systems plural
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