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    • CommentRowNumber1.
    • CommentAuthorJohn Baez
    • CommentTimeJun 20th 2010
    Aleks Kleyn emailed me saying he would like a reference or two to work on Ω-groups, so maybe someone can help him out. I put a query on the relevant page.
    • CommentRowNumber2.
    • CommentAuthorTim_Porter
    • CommentTimeJun 21st 2010

    There is a paper in an early JPAA by Grace Orzech, Obstruction theory in algebraic categories, which might be useful. I used Omega-groups briefly in a paper: Proceedings of the Edinburgh Mathematical Society (Series 2) (1987), 30: 373-381.

    • CommentRowNumber3.
    • CommentAuthorzskoda
    • CommentTimeJun 26th 2010

    I removed the query and listed Bourbaki and Orzech and one more paper from algebra.

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