[chongli]

Can you explain why it is not the case everything happens at random? Why these particles seem to follow physical laws?

What does random mean? Are you asking why the universe appears to be consistent and intelligible at all? Where would we be if it weren’t?

The weak anthropic principle covers this nicely. Perhaps it is an unsatisfying answer, but scientists and mathematicians aren’t usually in the business of answering ontological questions.

Maybe a good place to start thinking about this problem would be to read Wigner's work "The Unreasonable Effectiveness of Mathematics in the Natural Sciences".

I have studied all of this. Wigner’s account is very important for the debates it inspired but it’s far from the last word on the topic. There have been numerous replies addressing all of Wigner’s claims. Try reading Hamming’s replies to start.

[ezion]

The anthropic principle has nothing to do with why complex numbers are necessary for doing quantum mechanics. Complex numbers are purely abstract objects and yet are necessary for giving a proper account to the real world.

"From all of this I am forced to conclude both that mathematics is unreasonably effective and that all of the explanations I have given when added together simply are not enough to explain what I set out to account for." - Hamming

[chongli]

Most of mathematics has no use whatsoever in physics. Physicists select the mathematical tools that best enable them to build their models. In other cases, the necessary tools do not exist and they are built for purpose.

In many cases, physicists are not so successful. Look at the current debates in particle physics and the grand unified theory. Progress has largely stalled.

In other cases, models are revised continually as new information comes to light. For example, the age of the universe as we know it may double [1] from 13.79 billion years to 26.7 billion years.

You might call this “unreasonable effectiveness,” I call it a process of messy refinement and rethinking over thousands of years, much of it later shown to be invalid, despite mathematical correctness.

[1] https://phys.org/news/2023-07-age-universe-billion-years-pre...

[ezion]

Again, and last time: the fact that you can use mathematics to do physics to the point we've been able to do implies something about the universe. You should think about it a bit more.

[chongli]

All it says is that the universe is orderly and not chaotic. The anthropic principle covers that!