6533b836fe1ef96bd12a0a5d

RESEARCH PRODUCT

Highly irregular graphs with extreme numbers of edges

Jerzy MichaelZofia Majcher

subject

Discrete mathematicsPseudoforestHighly irregular graphEdge-graceful labelingTheoretical Computer ScienceHypercube graphCombinatoricsCycle graphDiscrete Mathematics and CombinatoricsPath graphMultiple edgesComplement graphMathematicsofComputing_DISCRETEMATHEMATICSMathematics

description

Abstract A simple connected graph is highly irregular if each of its vertices is adjacent only to vertices with distinct degrees. In this paper we find: (1) the greatest number of edges of a highly irregular graph with n vertices, where n is an odd integer (for n even this number is given in [1]), (2) the smallest number of edges of a highly irregular graph of given order.

https://doi.org/10.1016/s0012-365x(96)00056-8