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Timeline for strict 2-groups VS crossed modules

Current License: CC BY-SA 3.0

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Jan 20, 2016 at 14:29 comment added Tim Porter Pedro, A lot of Ronnie Brown's papers are available on his personal website. He has had some of them retyped with comments which might be useful.
Jan 20, 2016 at 12:17 comment added Pedro "you seem to be making your life difficult" perhaps! But it itches me on the brain to see that the same group object gives the same structure either internal to Cat or Grpd. Now, I am relieved :-) Thank you for the original paper.
Jan 20, 2016 at 10:32 history edited Tim Porter CC BY-SA 3.0
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Jan 20, 2016 at 7:20 history answered Tim Porter CC BY-SA 3.0