# Tagged Questions

Question on the meaning, history, and usage of mathematical symbols and notation. Please remember to mention where (book, paper, webpage, etc.) you encountered any mathematical notation you are asking about.

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### Is there a standard naming convention for set variables?

Is there a standard naming convention for variables that resemble sets? Because I want to name my variables so that reading becomes as easy and intuitive as possible. Details Currently, I'm ...
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### Is $R \setminus P$ a multiplicative subset?

Let $S$ be a subset of the ring $R$; we say that $S$ is multiplicative if   (a) $0 \notin S$,   (b) $1 \in S$, and   (c) whenever $a,b\in S$, we have $ab \in S$....
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### Modern approaches to mathematical notation

I'm interested if there is literature on projects which try to improve formal notation, especially for doing mathematics on an advanced level. For example, I'm thinking along the lines of diagrammatic ...
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### What is meant by an integral with $\Omega$ as its range: $\int_{\Omega}$

What does it mean when $\Omega$ is range of integral? $$\iint G \frac{\partial U}{\partial n} - U(J k G) ds =\int_{\Omega}{G\left(\frac{\partial U}{\partial n} -j k U\right)R^2 dw}$$ I do not ...
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### Is the notation $[x,\to[$ common?

I recently started reading Topology and Groupoids by Ronald Brown and this notation came up. The notations is $$[x,\to[ \; =\{z \mid x \leq z\}$$ and a similar notation for other type of intervals. I ...
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