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APAL
1998
54views more  APAL 1998»
13 years 4 months ago
Computable Isomorphisms, Degree Spectra of Relations, and Scott Families
Bakhadyr Khoussainov, Richard A. Shore
JCT
2011
83views more  JCT 2011»
13 years 1 days ago
Sandpile groups and spanning trees of directed line graphs
Abstract. We generalize a theorem of Knuth relating the oriented spanning trees of a directed graph G and its directed line graph LG. The sandpile group is an abelian group associa...
Lionel Levine