Numbers in a universe without a Platonic realm
My essay assumes that there is no Platonic realm to miraculously explain difficult issues like the source of law-of-nature relationships/rules in the universe. The same applies to numbers, though my essay does not consider the issue of numbers.
I contend that numbers in the universe must ultimately derive from relationships/rules where (if represented mathematically) you can cancel the numerator and denominator categories, and end up with a number: a thing without a category. And once you have a set of initial value numbers for system variables, then (to some extent) other system variable numbers logically derive from them due to law-of-nature relationships/rules.
The number pi is a difficult issue. I am contending that numbers always exist as relationships, not as final results. So pi does not exist as 3.14159... but as a relationship between the above-described "things without categories". And I contend that that the pi relationship is more likely something like the relatively simple Leibniz formula for pi, rather than the more complex formulas for pi. But being a non-algebraic number, for the pi relationship to exist in the universe (rather than existing in a Platonic realm) seems to imply many entities (i.e. particles) somehow being party to the relationship. I.e. pi seems to imply a relationship that somehow holds the parts of the universe together.
Physics can be seen as the discovery of actual relationships that exist in the universe; but mathematics can be seen as the discovery of the properties and nature of all possible types of relationships that can be represented symbolically, where the vast majority of these potential relationships don't actually exist in the universe. But the existence of numbers in the universe, rather than in a Platonic realm, seems to imply that there is hidden relationship structure in the universe that can only be inferred, because it can't be directly measured because there is no category to measure.
It seems relatively easy to imagine that the symbols + - x and ÷ could represent actual relationships that exist between actual categories in the universe, forming law-of-nature rules and initial-value numbers. But what these relationship symbols represent about the universe is quite different to what they represent to us because we have to put time and energy into calculating the "solutions" to mathematical equations, but in the universe there is no behind-the scenes calculations involving time and energy in order to arrive at the correct numerical values for outcomes. So what the multiplication symbol represents to us, and what it might represent to the universe, are 2 different things. So the square root relationship is not necessarily a difficult issue if you consider that multiplication of 2 identical categories giving a new category might be a reversible relationship from the point of view of the universe, and if you consider that numbers only exist as relationships, not as final results. So i, the square root of minus one, is not necessarily a difficult issue, if you want to assert that there is no Platonic realm. But the exponential relationship is more difficult to see.
I'm asserting that there is more to our universe than might be expected, and that belief in a Platonic realm underestimates the capabilities of our universe.