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    • CommentRowNumber1.
    • CommentAuthorTodd_Trimble
    • CommentTimeJun 5th 2017

    I started a new article hereditary property. In so doing I inadvertently created a number of gray links (some of which I found surprising). Comments are welcome.

    • CommentRowNumber2.
    • CommentAuthorUrs
    • CommentTimeJun 6th 2017

    One of the gray links was “torsionfree module”. We do have a minimum at torsion-free module. I have now made “torsionfree module” a redirect. Please feel free to rename the entry if “torsionfree” is to be preferred.

  1. I’ve ungrayed planar graph.

    • CommentRowNumber4.
    • CommentAuthorTodd_Trimble
    • CommentTimeJun 6th 2017

    Thanks, Urs, for that redirect.

    Noam: nice! If I have some time later I’ll add the forbidden minors characterization. Also the Mac Lane criterion sounds like it might be linked to matroid.

    • CommentRowNumber5.
    • CommentAuthorUrs
    • CommentTimeJun 6th 2017
    • (edited Jun 6th 2017)

    I have touched the section-structure at planar graph, aiming for ease of readability. (Rearranging properties to Properties and definitions to Definitions)

    • CommentRowNumber6.
    • CommentAuthorTodd_Trimble
    • CommentTimeJun 6th 2017

    Added a stub in order to ungray sentence.

    • CommentRowNumber7.
    • CommentAuthorTodd_Trimble
    • CommentTimeJun 6th 2017

    I have added a bit to planar graph on the Whitney matroid characterization, and in so doing added some examples to matroid. Also I created a stub Kuratowski.