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单词 radical
释义
radical

Physics
  • A root of a number or a quantity. The symbol √ is called the radical sign.


Mathematics
  • Given an ideal I in a ring R, its radical is

    I={rR|rnI for some n}.

    This is an ideal of R which contains I. A radical ideal is an ideal which equals its radical. Prime ideals are radical; indeed, I equals the intersection of all prime ideals containing I. See also nilradical.


Chemistry
  • A group of atoms, either in a compound or existing alone. See free radical; functional group.

    https://www.acdlabs.com/iupac/nomenclature/93/r93_569.htm Information about IUPAC nomenclature

    https://www.acdlabs.com/iupac/nomenclature/79/r79_1036.htm List of radical names


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