Double copy in gravity
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When I was younger, I understood these theories much better. Today I read them like a fascinated, but a bit distant bystander.
But it is terribly interesting. What does turning physics into math mean? When we find a mathematical shortcut that works but we don't understand - is this real? What is the relation between mathematical formulas and reality? And will we finally understand gravity some day?
It was an interesting article, but I am not sure I understood it all. I guess, I'm getting old. Or just too specialized.
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