In this short note we argue that the toughness of split graphs can be computed in polynomial time. This solves an open problem from a recent paper by Kratsch et al. (Discrete Math. 150 (1996) 231-245). (C) 1998 Elsevier Science B.V. All rights reserved.
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Univ Aveiro, Ctr Res & Dev Math & Applicat, Dept Math, P-3810193 Aveiro, Portugal
Univ Belgrade, Fac Math, Belgrade, SerbiaUniv Aveiro, Ctr Res & Dev Math & Applicat, Dept Math, P-3810193 Aveiro, Portugal
Andelic, Milica
Cardoso, Domingos M.
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Univ Aveiro, Ctr Res & Dev Math & Applicat, Dept Math, P-3810193 Aveiro, PortugalUniv Aveiro, Ctr Res & Dev Math & Applicat, Dept Math, P-3810193 Aveiro, Portugal
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W Virginia Univ, Lane Dept Comp Sci & Elect Engn, Morgantown, WV 26506 USAW Virginia Univ, Lane Dept Comp Sci & Elect Engn, Morgantown, WV 26506 USA
Eschen, Elaine M.
Wang, Xiaoqiang
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W Virginia Univ, Lane Dept Comp Sci & Elect Engn, Morgantown, WV 26506 USAW Virginia Univ, Lane Dept Comp Sci & Elect Engn, Morgantown, WV 26506 USA
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Anqing Normal Univ, Sch Math & Phys, Anqing, Peoples R ChinaAnqing Normal Univ, Sch Math & Phys, Anqing, Peoples R China
Cai, Gaixiang
Yu, Tao
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Anqing Normal Univ, Sch Math & Phys, Anqing, Peoples R ChinaAnqing Normal Univ, Sch Math & Phys, Anqing, Peoples R China
Yu, Tao
Xu, Huan
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Hefei Presch Educ Coll, Dept Publ Educ, Hefei, Peoples R ChinaAnqing Normal Univ, Sch Math & Phys, Anqing, Peoples R China
Xu, Huan
Yu, Guidong
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Anqing Normal Univ, Sch Math & Phys, Anqing, Peoples R China
Hefei Presch Educ Coll, Dept Publ Educ, Hefei, Peoples R ChinaAnqing Normal Univ, Sch Math & Phys, Anqing, Peoples R China
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Budapest Univ Technol & Econ, Dept Comp Sci & Informat Theory, Budapest, Hungary
MTA ELTE Numer Anal & Large Networks Res Grp, Budapest, HungaryBudapest Univ Technol & Econ, Dept Comp Sci & Informat Theory, Budapest, Hungary
Katona, Gyula Y.
Varga, Kitti
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Budapest Univ Technol & Econ, Dept Comp Sci & Informat Theory, Budapest, Hungary
Alfred Reny Inst Math, Budapest, HungaryBudapest Univ Technol & Econ, Dept Comp Sci & Informat Theory, Budapest, Hungary