Planar graphs without cycles of length 4, 7, 8, or 9 are 3-choosable

  • Authors:
  • Yingqian Wang;Qian Wu;Liang Shen

  • Affiliations:
  • -;-;-

  • Venue:
  • Discrete Applied Mathematics
  • Year:
  • 2011

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Abstract

It is known that planar graphs without cycles of length 4, i, j, or 9 with 4