kernel pair
(category theory) A couple of morphisms which constitute the pullback of a given morphism along itself.
simple past tense and past participle of dysfunction
A heterosquare in which the sums form a sequence of consecutive numbers.
(woodworking) A flat grooved piece of wood or other material used to hold the workpiece in position.
多くの圏において、ある射を自身に沿って引き戻して得られる射の対(核対)は、その射のファイバーが作る同値関係を表す。
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