What does the law of nature mean?

E is the essence of "natural law". Mathematically, it is a function: the limit when f (x) = (1+ 1/x) x, x→∞.

When people study some practical problems, such as the cooling of objects, they should study the limit when F (x) = (1+ 1/x) x approaches infinity. It is this finiteness obtained from infinite change that develops from two opposite directions (when X tends to positive infinity, the limit of the above formula is equal to E = 2.7 1828 ..., and when X tends to negative infinity, the result of the above formula is also equal to E = 2.7 1828 ...), which fully embodies the formation of the universe.