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Way back, in the entry, equivariant cohomology, Mike (I believe) wrote:
[in naive equivariant cohomology] one sees torsion popping up in odd places where one wouldn’t expect it.
and then
$RO(G)$-graded Bredon cohomology has lots of formal advantages over the integer-graded theory. For instance, the torsion that popped up in odd places before can now be seen as arising by “shifting” of something in the cohomology of a point in an “off-integer dimension,” which was invisible to the integer-graded theory.
Which results is this alluding to?
This sounds just like the kind of effect that I was after here. So is this just a special case of something more general and well known? What would be a reference?
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