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Dec 17, 2012 at 15:57 answer added Rachel timeline score: 2
Jan 26, 2012 at 18:42 comment added Ronnie Brown To make it I hope easier to understand the problem I have written a brief note on double groupoid compositions and convolutions, with some references on double groupoids, available from pages.bangor.ac.uk/~mas010/pdffiles/convdbgpd.pdf .
Jan 25, 2012 at 12:22 history edited S. Carnahan
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Jan 25, 2012 at 11:12 history asked Ronnie Brown CC BY-SA 3.0