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Mathematics

Balanced bipartite distance of $K_4$-free graphs

arXiv Mathematics
J\'ozsef Balogh, Ignacy Buczek, Andrzej Grzesik, Piotr Kuc
May 8, 2026
1 min read
Original
Mathematics > Combinatorics Title:Balanced bipartite distance of $K_4$-free graphs View PDFAbstract:We show that every $K_4$-free graph on $n$ vertices can be made balanced bipartite by removing at most $\frac{n^2}{9}$ edges. This proves a conjecture of Balogh, Clemen, and Lidický, and generalizes both Sudakov's result on the bipartite distance of $K_4$-free graphs and Reiher's result on the sparse half of $K_4$-free graphs. Bibliographic and Citation Tools Code, Data and Media Associated with this Article Demos Recommenders and Search Tools arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.