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    • CommentRowNumber1.
    • CommentAuthorDmitri Pavlov
    • CommentTimeOct 23rd 2019

    Cross-linked.

    diff, v12, current

    • CommentRowNumber2.
    • CommentAuthorzskoda
    • CommentTimeOct 24th 2019

    I see that the whole entry is written in terms of generators (faces and degeneracies), rather than arbitrary nondecreasing maps in Δ. The clean definition of both the homological and cohomological system of coefficients on the simplicial set is given in

    • S. I. Gelfand, Yu. I. Manin, Methods of homological algebra, I.4.7

    I may write it into the entry, but later.

    • CommentRowNumber3.
    • CommentAuthorDmitri Pavlov
    • CommentTimeOct 25th 2019
    The whole entry creates a rather strange impression.

    It starts with Section 4.

    The definitions are embedded in the text and are not structured.
    • CommentRowNumber4.
    • CommentAuthorAlexisHazell
    • CommentTimeOct 25th 2019

    The entry starting with section ’4’ seems to be a result of the inclusion of the differential graded objects - contents page, which itself has three section headings. So that page should perhaps be edited to use lists for grouping, rather than section headings.

    • CommentRowNumber5.
    • CommentAuthorDmitri Pavlov
    • CommentTimeOct 25th 2019

    Trying to repair the broken numbering.

    diff, v13, current

    • CommentRowNumber6.
    • CommentAuthorDmitri Pavlov
    • CommentTimeOct 25th 2019

    Added a modern definition.

    diff, v13, current