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- W2350692970 abstract "Concerning that the relation between Welsh′s weak maps and strong maps is not very good,a new definition of weak map is given and the concepts of rank-weak maps and independent sets-reflected maps are introduced.Thus a strong map must be weak and a map is rank-weak if and only if its extension is!weak.Then the relations among rank-weak maps,independent set-reflected maps and closed set-reflected are studied.The isomorphism between matroids is characterized by these new maps,which shows that both weak map and rank-weak map are appropriate morphisms for matroids." @default.
- W2350692970 created "2016-06-24" @default.
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- W2350692970 date "2007-01-01" @default.
- W2350692970 modified "2023-09-24" @default.
- W2350692970 title "Weak maps and rank-weak maps between matroids" @default.
- W2350692970 hasPublicationYear "2007" @default.
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