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### Vertical line in LaTeX [duplicate]

How can I get this vertical line in LaTeX: | I dont see a command for it, and if I type | it becomes horizontal.
12k views

### Symbol for “such that” (not in set) [duplicate]

If a is a set a \leftarrow { b| b must satisfies property} but if a is an element a \leftarrow b| b must satisfies property is this a usual notation? Or what other symbol should I use for the "...
111 views

### Space between a|b in math mode? [duplicate]

For a context free grammar I need to write: A -> a | b My code for this is $A \rightarrow a | b$ however this gives me something like A -> a|b // wanted: a | b, note the space before and ...
66 views

### Spacing around divide (|) symbol [duplicate]

LaTex by default sets fairly small spaces around "divide" symbol (|). Is there a way to force larger skip (e. g. force LaTex to treat | as binary operator or = symbol)? MWE would be fairly simple: \...
322k views

### How to write norm which adjusts its size? [duplicate]

I need to write norm of sum, but the sum symbol is larger than tho norm symbol (||) and it doesn't look good. Is there any symbol for norm which will adjust its size? \documentclass[12pt,a4paper]{...
15k views

### variable-sized “such that” pipe

I am looking for a pipe symbol that can be made to vary in height automatically. One of the common ways of writing "such that" in mathematics is with the pipe symbol (|). The pipe can be represented ...
83k views

### vertical bar for absolute value and conditional expectation

Now I use "mid" for all vertical bars, but I wonder what's the proper ways. The first scenario is vertical bar for absolute value. Now I just right $x\leq \mid x \mid$. but is this correct? The ...
4k views

### Vertically asymmetric size variation for parentheses

One of the difficulties I have with writing formulas in LaTeX is that the standard sizing tools for the variable-size operators (parentheses, etc.) do not account for "high" symbols and "low" symbols ...
30k views

### divides, not divides and cardinalities

In group theory it happens very often that you want to say: "The order of $H$ divides / does not divide the order of $G$." But the length of | is then always the same: $|H| | |G|$ produces |H|||G| ...
27k views

### a ∣ b and a ∤ b in formulas

What is the correct way, both semantically and typographically, to typeset a ∣ b and a ∤ b (read “a divides b” and ”a does not divide b”)? I guess I could simply type | (vertical bar, U+007C) or \...
822 views

### What style/font is this?

Does anyone know how to create numbering for Theorem/lemma/… like this one in the image below, also any idea about the font name?
3k views

### Using \big| and \right| versus \bigr\rvert and \right\rvert

Based on the answers to this question (about \bigl, \bigr, \big, etc.) and this question (about \lvert, \rvert, |, etc.), I would think that anytime one used a vert bar to delimit on the right they ...
2k views

### \mid or \vert in a conditional expectation or density function?

Which would you use to write a conditional density function $f(y|x)$ or a conditional expectation $E(y|x)$? There is an old question on this \mid, | (vertical bar), \vert, \lvert, \rvert, \divides, ...