## Abstract

Given a graph G and a subset S of the vertex set of G, the discrepancy of S is defined as the difference between the actual and expected numbers of the edges in the subgraph induced on S. We show that for every graph with n vertices and e edges, n < e < n(n − 1)/4, there is an n/2‐element subset with the discrepancy of the order of magnitude of \documentclass{article}\pagestyle{empty}\begin{document}$\sqrt {ne}$\end{document} For graphs with fewer than n edges, we calculate the asymptotics for the maximum guaranteed discrepancy of an n/2‐element subset. We also introduce a new notion called “bipartite discrepancy” and discuss related results and open problems.

Original language | English (US) |
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Pages (from-to) | 121-131 |

Number of pages | 11 |

Journal | Journal of Graph Theory |

Volume | 12 |

Issue number | 1 |

DOIs | |

State | Published - 1988 |

## ASJC Scopus subject areas

- Discrete Mathematics and Combinatorics
- Geometry and Topology