D. Carter

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20242026

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math.CO2026

Hadwiger's Conjecture for ${co-claw, co-gem}$ -free graphs and ${fork, antifork}$ -free graphs

Daniel Carter, Jung Hon Yip

We prove Hadwiger's Conjecture for ${co-claw, co-gem}$ -free graphs and ${fork, antifork}$ -free graphs, where the co-claw is the disjoint union of a…

math.CO2026

When all directed cycles have the same weight

Eli Berger, Daniel Carter, Paul Seymour

A digraph $G$ is weightable if its edges can be weighted with real numbers such that the total weight in each directed cycle equals 1. There are several equivalent conditions: that…

Hadwiger's Conjecture for {co-claw,co-gem}-free graphs and {fork,antifork}-free graphs

When all directed cycles have the same weight

Hadwiger's Conjecture for ${co-claw, co-gem}$ -free graphs and ${fork, antifork}$ -free graphs