matt grime
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Johan de Vries said:For physicists this is different.
Possibly. But we're all guilty of extrapolating what we know too far.
I think that a large minority of advanced theoretical physics students know what Borel Resummation means.
and they ought to know what cohomology is too, since it is a very common tool in large parts of theoretical physics these days, albeit often in disguise. Indeed it even comes in in engineering/applied maths very early: the fact that every conservative field in a simply connected domain is grad of something is a fact about cohomology, for instance. It is just saying that a certain homology group is trivial (the image of grad is equal to the kernel of curl).