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math.GM2021
A Graceful Algebraic Function Labelling of Rooted Symmetric Trees
Rafael I. Rofa
Let T=(V,E) be a tree with vertex set V and edge set E. A graceful labelling f of T is an injective function f from V into {0, 1, ..., |E|} such that if edge uv is assigned the lab…
math.CO2021★ 1 cited
Graceful and Strongly Graceful Permutations
Rafael Rofa
A graceful labelling of a graph G is an injective function f from the set of vertices of G into the set {0,1,...,|EG|} such that if edge uv is assigned the label |f(u)-f(v)| then a…