Set - a category of all sets. Its objects are all sets; its morphisms are set functions.
Set所有集合的范畴.
It is shown that the categorical isomorphisms in the category of matroids with either rank strong maps or strong maps as morphisms are isomorphisms in matroids sense.
以秩强映射或强映射为态射的拟阵范畴中的范畴同构都是拟阵同构。
Especially gives a new characterization on morphisms of category of semicontinuous lattices.
着重于半连续格范畴的态射类的构成，给出了一个新的刻画。
By using the weighted generalized inverses of morphisms, the weighted minus ordering and the weighted star ordering of morphism set in a category are introduced and discussed.
利用态射的加权广义逆，引进并讨论态射集中的加权减序和加权星序。
By using the weighted generalized inverses of morphisms, the weighted minus ordering and the weighted star ordering of morphism set in a category are introduced and discussed.
利用态射的加权广义逆，引进并讨论态射集中的加权减序和加权星序。
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