Subcubic planar graphs of girth 7 are class I

08/13/2021

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by   Sebastien Bonduelle, et al.

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We prove that planar graphs of maximum degree 3 and of girth at least 7 are 3-edge-colorable, extending the previous result for girth at least 8 by Kronk, Radlowski, and Franen from 1974.