Part 2 4d gauge theory and 2d CFT from 6d point of view
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John Baez, University of California, Riverside: baez@math.ucr.edu Michael Barr, McGill University: barr@triples.math.mcgill.ca Lawrence Breen, Universit´ e de Paris
(The definition of this invariant given in [13] is somewhat different from the one we use, which comes from [23], but the two definitions can be readily shown to agree.) Furuta and