Given a finite covering of graphs f:Y→X , it is not always the case that H1(Y;C) is spanned by lifts of primitive elements of π1(X) . In this article, we… Click to show full abstract
Given a finite covering of graphs f:Y→X , it is not always the case that H1(Y;C) is spanned by lifts of primitive elements of π1(X) . In this article, we study graphs for which this is not the case...
               
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