On characterizing ribbons and finding sk
β
Jean Ponce
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Article
π
1990
π
Elsevier Science
β 725 KB
Following Rosenfeld, we compare Blum, Brooks, and Brady ribbons. We prove that Blum and Brady ribbons are not, in general, Brooks ribbons. Conversely, we prove that Brooks ribbons are, in general, neither Blum nor Brady ribbons. For Blum and Brady ribbons, it is in principle trivial to decide whethe