2008
DOI: 10.1016/j.endm.2008.01.009
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Partial Characterizations of Circular-Arc Graphs

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Cited by 4 publications
(12 citation statements)
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“…Finding a forbidden subgraph characterization of circular-arc graphs is a challenging open problem studied since the late 1960s [14,21,22,23,24]. Many partial results toward this goal have been proposed over the years, but a full answer remains elusive, capturing the interest of many researchers [1,2,6,14,17,21,22,23,24]. A certifying algorithm is an algorithm that outputs a certificate, along with its answer (be it positive or negative), where the certificate can be used to easily justify the given answer.…”
Section: Introductionmentioning
confidence: 99%
“…Finding a forbidden subgraph characterization of circular-arc graphs is a challenging open problem studied since the late 1960s [14,21,22,23,24]. Many partial results toward this goal have been proposed over the years, but a full answer remains elusive, capturing the interest of many researchers [1,2,6,14,17,21,22,23,24]. A certifying algorithm is an algorithm that outputs a certificate, along with its answer (be it positive or negative), where the certificate can be used to easily justify the given answer.…”
Section: Introductionmentioning
confidence: 99%
“…In [5], circular-arc graphs are characterised within some graph classes including, among others, the class of diamond-free graphs. The following is a straightforward corollary of Theorem 16 in [5].…”
Section: Preliminary Resultsmentioning
confidence: 99%
“…Circular-arc graphs can be recognised in linear time [29], and have been characterised recently by a family of obstacles [18]. Previously, partial characterisations by minimal forbidden induced subgraphs were presented in [32] and [5].…”
Section: Basic Definitionsmentioning
confidence: 99%
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“…On the one hand, as observed in [35], if H is isomorphic to claw, 4-wheel, 5-wheel, or tent, then Q H ( ) does not have the circular-ones property for rows. On the other hand, if H is isomorphic to net, C 6 , or C* k for some ≥ k 4, then it is also the case that Q H ( ) does not have the circular-ones property for rows because each of Q (net) and Q C ( ) 6 contains M IV as a configuration and Q C ( ) * k contains M k ( ) * I as a configuration for each ≥ k 4. Since H is an induced subgraph of G Q H , ( ) is contained in Q G ( ) as a configuration.…”
Section: Corollary 42 a Graph G Is A Proper Helly Circular-arc Graphmentioning
confidence: 99%