My take.
First, math is both discovered and invented. The relationship between a circle and its circumference is a discovery. The invented part is the formula for determining what the circumference of a circle is; the symbolic language humans invented to manipulate and make use of the relationship we discovered.
And then we go and confuse the invention of the language with the invention of the relationship. No we did not invent the circle and its circumference. That naturally occurring relationship has always been there well prior to any human having the capacity to even notice there was a relationship.
Though the math we use to work the relationship is invented the math that
is the relationship is discovered.
Second, we should not be surprised at the power of math to model, even if imperfectly, the natural relationships we find in this universe since we inhabit a highly logical, if imperfect, universe. No outside influence was needed to say the circumference of a circle will be this. It is a natural relationship that is an intrinsic part of the structure. It just took a smart ape to discover the math in it and a smarter one to invent the math to manipulate and make use of it.
Edited by AZPaul3, : No reason given.
Edited by AZPaul3, : No reason given.
Eschew obfuscation. Habituate elucidation.