Infinity

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GRE

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[编辑] GRE 红宝书

  • n. 无限的时间或空间
  • [英] 无限的时间或空间 ( endless or unlimited space, time, distance, quantity, etc.)
  • [类] 反义词: bounded space ( 有限空间)
  • [记] in ( 无) +fin ( 结束) +ity -> 没有结束 -> 无穷

[编辑] Webster Collegiate

noun (plural -ties)

  • Date: 14th century
  • 1.
    • a. the quality of being infinite
    • b. unlimited extent of time, space, or quantity ; boundlessness
  • 2. an indefinitely great number or amount <an infinity of stars>
  • 3.
    • a. the limit of the value of a function or variable when it tends to become numerically larger than any preassigned finite number
    • b. a part of a geometric magnitude that lies beyond any part whose distance from a given reference position is finite <do parallel lines ever meet if they extend to infinity>
    • c. a transfinite number (as aleph-null)
  • 4. a distance so great that the rays of light from a point source at that distance may be regarded as parallel


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