The exponential of the derivative translates a function 𝑓(𝑥) by an amount εpic.twitter.com/mwQ1aLpOHt
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But like, say they measure quantity A, which is analytic. So you measure it in a small neighbourhood of where you stand, and then you've got all its derivatives so you know the value of quantity A *everywhere* (or am I missing something because I know next to undergrad in QM)
you're right if we're talking about pure QM .. that theory is not relativistic .. this was one of the reasons why we developed QFT
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I guess I am just completely lost then
I was just thinking pure classically tbh. If something is analytic then knowing what it is on some open set will tell you what it is everywhere. But I have no idea what the analytic things going into QTF are, nor coming out of it :P -
neither do i hah
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