Set - a categoryof all sets. Its objects are all sets; its morphisms are set functions.
Set 所有集合的范畴.
2
It is shown that the categorical isomorphisms in the categoryof 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。
3
Especially gives a new characterization on morphismsofcategory of semicontinuous lattices.