All physics laws in one equation, which?

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Neil deGrasse Tyson discusses the concept of unifying all laws of physics into a single equation, referencing Richard Feynman's assertion that "U = 0" may represent this unification. The discussion highlights the Lagrangian of the standard model combined with general relativity as an effective quantum field theory, emphasizing the complexity of this unification. The conversation also touches on the absence of a governing equal sign in modern physics, particularly in the context of vector fields and conservation laws.

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around 3:00 minutes into the video neil says that all the laws of physics can be simplified into one formula, which formula is this? is it e=mc^2?

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atyy said:
According to Feynman,

U = 0

:smile:
What is U? :smile:
 
What is U?
That's what we have to learn yet :).
 
atyy said:
According to Feynman,

U = 0

:smile:

How is it Feynman failed to eliminate the equal sign. :eek:

In unifying electricity and magnetism in a modern way you might declare that A is a vector field on spacetime. Various terms expressed as derivatives of A are associated with physically measurable or measurably inferred quantities. There is no governing equal sign in this instance. This is not to say that there are none to be had. Conservation laws show up as mathematical identities.
 
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