Boolean ring
An adhesive that is applied in a liquid molten form but sets into a solid form as it cools.
(zoology) Any member of the order Sphenodontida or of the Sphenodontidae, the only family in the order with living species (tuataras in the genus Sphenodon).
(algebra) A ring whose multiplicative operation is idempotent.
(idiomatic) To produce or attain, at least for a period of time, an especially satisfactory degree of achievement or fulfilment.
ブール環では乗法が冪等であるため、すべての元はその二乗と等しくなる。
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DiQt
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