Context: I stumbled upon this link[1], which I bookmarked almost ten years back. Reading that made me wonder what the standard reference is, for mathematics and its definitions.<p>For a programming language, you can refer to its specification or source code. For weights and measures, we have the SI system. What is there for mathematics?<p>[1]https://blog.mathed.net/2012/07/rysk-stumps-secondary-mathematics.html