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Symmetry Question

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Posted by Harvey on May 6, 2002 22:17:52 UTC

Paul,

Let me ask you a question. If symmetries are a necessary constraint on physics, and symmetries create most of physics (e.g., the achievements of Emmy Noether), therefore, it is already known that the laws of physics are under special constraints - nothing new is obtained.

In addition, Dick utilizes symmetries in his equations, so it seems almost a trite issue that he would obtain most of the famous physics equations if he includes key symmetry assumptions.

So, I don't understand the big deal. It is just telling us something that we already know.

1) Accept symmetries, obtain physics.

2) Make fancy equations without symmetries, maybe unlikely you obtain physics.

3) Make some fancy equations + add symmetries, maybe you obtain physics

It seems that (3) is what Dick accomplished. Why do you think the results would be any different than what (1) would tend to indicate for (3)? It seems to me like Dick has 'discovered' that symmetries result in the laws of physics. What is incorrect in this assumption?

Warm regards, Harv

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