Graceful labellings of paths |
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Authors: | Rohan Cattell |
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Institution: | School of Mathematical and Physical Sciences, University of Newcastle, Callaghan, NSW 2308, Australia |
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Abstract: | It is easily shown that every path has a graceful labelling, however, in this paper we show that given almost any path P with n vertices then for every vertex v∈V(P) and for every integer i∈{0,…,n-1} there is a graceful labelling of P such that v has label i. We show precisely when these labellings can also be α-labellings. We then extend this result to strong edge-magic labellings. In obtaining these results we make heavy use of π-representations of α-labellings and review some relevant results of Kotzig and Rosa. |
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Keywords: | 05C78 05C05 |
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