urelement

词形变化

urelements 复数 urelements

别名

ur-element

释义与例句

n.
  1. 1.

    A mathematical object which is not a set but which can be an element of a set.

    数学

    1996, Scientific Books staff (translators), Yuri L. Ershov, Definability and Computability, Scientific Books, page viii, The introduction of urelements would seem to be a technical improvement; however, now we know that just such an extension of the notion of the admissible set led to the universal theory of computability based on the notion of definability by formulas with (in a broad sense) effective semantics.

词源

From ur- (“primordial”) + element.

来源：wiktionary