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تسجيل مستخدم جديدClique in 3-track interval graphs is APX-hard
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Minghui Jiang
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Butman, Hermelin, Lewenstein, and Rawitz proved that Clique in t-interval graphs is NP-hard for t >= 3. We strengthen this result to show that Clique in 3-track interval graphs is APX-hard.
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