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    • CommentRowNumber1.
    • CommentAuthorTodd_Trimble
    • CommentTimeFeb 14th 2016

    Over at rack, I noticed brief mention of the notion of shelf. As some of you will know, shelves also crop up in large cardinal axioms, so I gave shelf its own subsection and mentioned some of the lore (e.g., Laver tables). The topic might be worth a separate page.

    • CommentRowNumber2.
    • CommentAuthorMike Shulman
    • CommentTimeFeb 14th 2016

    Definitely worth its own page!

    • CommentRowNumber3.
    • CommentAuthorGuest
    • CommentTimeOct 31st 2022

    is it on purpose, that you swapped \triangleright and \triangleleft from the wikipedia definition? And if so, why?

    • CommentRowNumber4.
    • CommentAuthorzskoda
    • CommentTimeNov 1st 2022

    Dear Guest, please do some basic checking before accusing nnlabbers for laisy copying from wikipedia. The wikipedia article has been started in 2011, see The plethora of relations you refer to about the triangle left and right actions are in nnLab from 2010, see version 3 A left action in mathematics is more standardly denoted by triangle pointed to the left, which is LaTeX command triangleright, \triangleright. The conventions in the current wikipedia article are nonstandard.

    • CommentRowNumber5.
    • CommentAuthorGuest
    • CommentTimeNov 2nd 2022
    Dear zskoda, I am sorry for my wording, you are absolutely correct. Thank you for explaining! <3
    • CommentRowNumber6.
    • CommentAuthorzskoda
    • CommentTimeNov 3rd 2022

    You are welcome !

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