Let o(H) be the order of the smallest colour class in any proper x(H)-colouring of H. Pro G20(H) for a graph G, then r(G, H) 2 (G|-1)(x(H)-1)+o(H).

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter4: More On Groups
Section4.4: Cosets Of A Subgroup
Problem 24E: Find two groups of order 6 that are not isomorphic.
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Let o(H) be the order of the smallest colour class in any proper x(H)-colouring of H. Prove that if
G|2o(H) for a graph G, then
r(G, H) ≥ (G|-1)(x(H)-1)+(H).
Transcribed Image Text:Let o(H) be the order of the smallest colour class in any proper x(H)-colouring of H. Prove that if G|2o(H) for a graph G, then r(G, H) ≥ (G|-1)(x(H)-1)+(H).
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