# Tagged Questions

Various aspects of writing mathematics such as style, notation, grammar, frequently used phrases and common mistakes.

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### Writing Math: Is using both $e^x$ and $\exp(x)$ ok for longer works?

I wanted to know what you guys think about mixing both notations for the exponential function $e^x$(for simple argument and to save space for larger equations) and $\exp(x)$ (for more complicated ...
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### Soft Question: Good strategies for writing a technical book or textbook

Most people would agree that doing technical work, whether it be pure or applied, and learning the background knowledge necessary to do this work comprises most of the literature and curriculum in ...
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### How to write a set with an index

I'd like to write a set $\{x_1, x_2, ..., x_n\}$ in a simple way. What is a popular way? In my high school, I wrote it as $\{x_i\}_{i=1}^{n}$. Is it a correct way?
### Is there an alternative way to represent the $\operatorname{diag}$ function?
In optimization, it is common to see the so called $\operatorname{diag}$ function Given a vector $x \in \mathbb{R}^n$, $\operatorname{diag}(x)$ = $n \times n$ diagonal matrix with components of $x$ ...