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0 pointsimmmmmm5y ago0 comments

correct!

but if you introduce a derivative which is covariant under diffeomorphisms and u(1) transformations

D = d + \omega + A

you see that gravitation (connection \omega) enters on a somewhat same footing as the electromagnetic potential (A). there are nuances ofc, but the view (force/curvature) depends from where you're looking.

also in real life particles don't real exist... they're excitations in a field

0 comments

jfengel5y ago

"Come now, do you really expect me to do derivatives that are covariant under diffeomorphisms and u(1) transformations in my head while strapped to a centrifuge?"

"No, Mr Bond, I expect you to die."

Obligatory https://xkcd.com/123/

immmmmmOP5y ago

hahaha thanks!

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