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Cutting two graphs simultaneously
Authors:Viresh Patel
Institution:Department of Mathematics, London School of Economics, Houghton Street, London WC2A 2AE, UK
Abstract:Consider two graphs, equation image and equation image , on the same vertex set V, with equation image and equation image having equation image edges for equation image . We give a simple algorithm that partitions V into sets A and B such that equation image and equation image . We also show, using a probabilistic method, that if equation image and equation image belong to certain classes of graphs, (for instance, if equation image and equation image both have a density of at least 2/, or if equation image and equation image are both regular of degree at most equation image with n sufficiently large) then we can find a partition of V into sets A and B such that equation image for equation image . © 2007 Wiley Periodicals, Inc. J Graph Theory 57: 19–32, 2008
Keywords:cuts
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