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# Beginner LaTeX Guide

$${\LaTeX}$$ is an extremely useful typesetting language to learn, especially in a math environment like this. However, the quick instructions Brilliant.org gives just aren't good enough to use for most situations.

This is why I've decided to create a beginner's $${\LaTeX}$$ guide. There is a table of contents for easy symbol or format finding. I hope you can refer to this guide later, when writing solutions, problems, or notes.

Note: You can also view Latex codes by hovering over the equation. Read Seeing actual $$\LaTeX$$ for more details!

To quickly navigate to the part you want via the Table of Contents, press CTRL+F, and type in the section you want (including the tilde's ~ before and after the section).

~Using LaTeX~

~Text~

~Basic Operations~

~Fractions~

~Sums, Products, Limits, and Integrals~

~Modular Arithmetic~

~Trigonometry~

~Combinatorics~

~Geometry~

~Calculus~

~Parentheses~

~Fitting Parentheses~

~Tables and Arrays~

~Other~

~Using LaTeX~

To use LaTeX, put a backslash and a left parenthesis before the math you want to LaTeXify, and put a backslash and a right parenthesis after the math you want to LaTeXify. For example:

Imgur

Shows up as $$1+2+3=6$$

However, if you want your math to be more conspicuous and centered, you can use a backslash then a left bracket, then your math, then a backslash then a right bracket. For example:

Imgur

Shows up as

$1+2+3=6$

This second option is the display text. A lot of other math operations will look better in this text. To force the first option to also use display text, you can add a \displaystyle at the beginning.

~Text~

To write text in LaTeX use \text{your text here}. This gives $$\text{your text here}$$

To use bolded text, use \textbf{your text here}. This gives $$\textbf{your text here}$$

Italicized text is similar: \textit{your text here}. This gives $$\textit{your text here}$$

~Basic Operations~

"x+y" gives $$x+y$$

"x-y" gives $$x-y$$

"x=y" gives $$x=y$$

"x\times y" gives $$x\times y$$

"x\cdot y" gives $$x\cdot y$$

"x\div y" gives $$x\div y$$

"x\pm y" gives $$x\pm y$$

"x\mp y" gives $$x\mp y$$

x^{y} gives $$x^{y}$$

x_{y} gives $$x_{y}$$

\sqrt{x} gives $$\sqrt{x}$$

\sqrt[y]{x} gives $$\sqrt[y]{x}$$

\log_{a}b gives $$\log_{a}b$$

\ln a gives $$\ln a$$ (that's a lowercase "l" in the beginning, not an uppercase "i")

Note that many of you use "*" or "." for multiplying. This shows up as $$*$$ and $$.$$ which don't look good. Use $$\times$$ or $$\cdot$$ instead.

Also, the brackets in x^{y} or x_{y} may be omitted if the index is a single character. However, if it is more than one character like $$x^{10}$$, then brackets are needed or else it will show up as $$x^10$$.

~Fractions~

Many people simply put a slash between the numerator and denominator to represent a fraction: $$x/y$$. However, there are neater ways in LaTeX.

\frac{x}{y} is the standard way to write fractions: $$\frac{x}{y}$$

\dfrac{x}{y} gives a bigger clearer version. However, this takes up more vertical space: $$\dfrac{x}{y}$$ the "d" stands for "display text".

EXTRA

\cfrac{x}{y} is a special type of fraction formatting. This is for continued fractions, hence the "c". typing \cfrac{x}{x+\cfrac{y}{y+\cfrac{z}{2}}} gives $$\cfrac{x}{x+\cfrac{y}{y+\cfrac{z}{2}}}$$

~Sums, Products, Limits, and Integrals~

These four are in the same group because they format differently than other symbols.

"\sum" gives $$\sum$$

"\prod" gives $$\prod$$

"\lim" gives $$\lim$$

"\int" gives $$\int$$

We can add the other elements of each thing by using _ and ^:

\sum_{i=0}^n gives $$\sum_{i=0}^n$$

\prod_{i=0}^n gives $$\prod_{i=0}^n$$

\lim_{x\rightarrow n} gives $$\lim_{x\rightarrow n}$$

\int_{a}^{b} gives $$\int_a^b$$

However, these don't look very good. However, once putting it on display text, either using the brackets or using \displaystyle as said in the beginning of the guide, we can make them look normal.

\displaystyle\sum_{i=0}^n gives $$\displaystyle\sum_{i=0}^n$$

\displaystyle\prod_{i=0}^n gives $$\displaystyle\prod_{i=0}^n$$

\displaystyle\lim_{x\rightarrow n} gives $$\displaystyle\lim_{x\rightarrow n}$$

\displaystyle\int_{a}^{b} gives $$\displaystyle\int_{a}^{b}$$

~Modular Arithmetic~

"\equiv" gives $$\equiv$$

\mod{a} gives $$\mod{a}$$

\pmod{a} gives $$\pmod{a}$$

\bmod{a} is \mod{a} without the space before it: $$a\bmod{b}$$ versus $$a\mod{b}$$

"a\mid b" creates $$a\mid b$$, which states that $$b$$ is divisible by $$a$$.

~Trigonometry~

Many of you simply put "sin" and "cos" and be done with it; however, adding a backslash before those two make it look much better.

\sin gives $$\sin$$ (as opposed to $$sin$$)

\cos gives $$\cos$$ (as opposed to $$cos$$)

\tan gives $$\tan$$

\sec gives $$\sec$$

\csc gives $$\csc$$

\cot gives $$\cot$$

\arcsin gives $$\arcsin$$

\arccos gives $$\arccos$$

\arctan gives $$\arctan$$

Putting a ^{-1} after the trigonometric function designates it as the inverse. For example, \sin^{-1} gives $$\sin^{-1}$$.

\sinh gives $$\sinh$$

\cosh gives $$\cosh$$

\tanh gives $$\tanh$$

~Combinatorics~

\binom{x}{y} gives $$\binom{x}{y}$$

\dbinom{x}{y} gives $$\dbinom{x}{y}$$

~Geometry~

x^{\circ} gives $$x^{\circ}$$ the degree symbol

\angle gives $$\angle$$

\Delta gives $$\Delta$$, for example $$\Delta ABC$$

\triangle also does the job: $$\triangle ABC$$

\odot gives $$\odot$$, for example $$\odot O$$

AB\parallel CD gives $$AB\parallel CD$$

AB\perp CD gives $$AB\perp CD$$

A\cong B gives $$A\cong B$$

A\sim B gives $$A\sim B$$

~Calculus~

We've already learned to use $$\int$$. However, there is much more to calculus than integrals!

There is no command for the total derivative, so you have to use \text{d} to get around it.

For example, \dfrac{\text{d}}{\text{d}x} gives $$\dfrac{\text{d}}{\text{d}x}$$

Fortunately, there is a symbol for partial derivatives: \partial gives $$\partial$$.

So, \dfrac{\partial}{\partial x} gives $$\dfrac{\partial}{\partial x}$$

Double or even triple integrals can be condensed into \iint and \iiint, respectively. This gives $$\displaystyle\iint$$ and $$\displaystyle\iiint$$ (I am using display text).

EXTRA

Line integrals can be written as \oint: $$\displaystyle \oint$$.

~Parentheses~

( and ) are standard for parentheses: $$(a+b)$$

[ and ] are used for brackets: $$[a+b]$$

{ and } are used for curly brackets: $$\{a+b\}$$

\lfloor and \rfloor are used for the floor function: $$\lfloor a+b\rfloor$$

\lceil and \rceil are used for the ceiling function: $$\lceil a+b\rceil$$

\langle and \rangle are used for vectors: $$\langle a,b\rangle$$

The vertical line symbol | (not a capital "i" or a lowercase "l"!) is used for absolute value: $$|a+b|$$

~Fitting Parentheses~

Suppose you want to write $$\left(\dfrac{a}{b}\right)^c$$. When you try, it gives $$(\dfrac{a}{b})^c$$. How did I stretch the parentheses to fit?

To stretch the parentheses, use \left before the left parenthesis and \right before the right one, like this: \left( and \right). When put back into the expression, this yields $$\left(\dfrac{a}{b}\right)^c$$ as desired.

This isn't just for parentheses; you can use them on brackets: $$\{\dfrac{a}{b}\}$$ changes into $$\left\{\dfrac{a}{b}\right\}$$

You can also use this technique on things that use only one parenthesis/bracket/etc. However, just putting \left or \right will yield an error. This is because \left and \right come in pairs. In orer to sidestep this, you can put a period after the one that you do not need (i.e \left. or \right.). This way it will not produce an error, and it will stretch the parenthesis to size. For example, this: \left. \dfrac{x^3+2x}{3x^2}\right|_0^3 gives this: $$\left. \dfrac{x^3+2x}{3x^2}\right|_a^b$$

~Tables and Arrays~~

To make tables and arrays, use \ begin{array}{[modifiers]} ... \ end{array}. (A space is put before "begin" and before "end" to prevent the LaTeX from prematurely rendering. Even though there are no brackets around to make it render, it does so anyways, I don't know why.)

In the modifiers section, you put either l for left, c for center, or r for right, per column. For example, to make an array with 3 columns, all formatted to align along the right edge, you put "rrr" inside the modifier. It would look like this: \ begin{array}{rrr} ... \ end{array}.

To add a vertical line between two columns, put the vertical line symbol | between two modifiers: for example, if you wanted a horizontal line between the first two columns in the previous example, then you would put \ begin{array}{r|rr} ... \ end{array}.

For actual inputting in the array, there are two rules: put a "&" sign to notify to switch to the next column, and put a "\ \" divider (again a space is added in between to prevent it from rendering) to notify to switch to the next row. When building the table, always fill in row by row: in the first row, fill in all the corresponding columns, and then switch to the next row; then continue in this manner. For example, if I wanted to make a $$3\times 3$$ square with the numbers $$1\rightarrow 9$$, I would put: \ begin{array}{lcr}1 & 2 & 3 \ \ 4 & 5 & 6 \ \ 7& 8 & 9 \ end{array}. This produces: $$\begin{array}{lcr}1 & 2 & 3 \\ 4 & 5 & 6 \\ 7& 8 & 9 \end{array}$$.

To insert horizontal lines between any two rows, put \hline after the divider that separates the two rows. For example, if I wanted to add horizontal lines and vertical lines in the previous example to look like a tic tac toe board, this would be my code: \ begin{array}{l|c|r}1 & 2 & 3 \ \ \hline 4 & 5 & 6 \ \ \hline 7& 8 & 9 \ end{array} and it will produce: $$\begin{array}{l|c|r}1 & 2 & 3 \\ \hline 4 & 5 & 6 \\ \hline 7& 8 & 9 \end{array}$$

~Other~

To negate any symbol, put \not before the symbol. For example, "\not =" gives $$\not =$$

Look here for a big list of symbols.

If you don't know how to do something or see something missing in this guide, please do comment below so I can add it! Together, we can make a great LaTeX guide!

Note by Daniel Liu
3 years ago

Sort by:

If there is anything that doesn't make sense or is organized bad, please tell me so I can fix it.

I know that regular notes get hopelessly lost in the Feed even just after a few days. However, I wish that somehow this can survive, because I have noticed a lot of people in need in learning some basic LaTeX. Maybe someone can do something about this? · 3 years ago

Just a note here: For limits, I like using "\lim \limits_{a \to b} a" which yields $$\lim \limits_{a \to b} a$$ · 2 years, 10 months ago

Daniel Liu we can also use "n\choose{r}" to display $$n\choose{r}$$ · 1 year, 10 months ago

This is a fantastic idea. I think that we should either make a guide accessible like the algebra dictionary, or brilliant should have a link to this (and other support notes like it) in the formatting guide.

Notice that brilliant does have some well chosen examples. I think that it's just a good idea to expound upon them as you are. · 3 years ago

This is a useful idea. I think that we should make a guide accessible like the algebra dictionary. · 2 years, 6 months ago

This is a fantastic idea. I think that we should either make a guide accessible like the algebra dictionary, or brilliant should have a link to this (and other support notes like it) in the formatting guide.

That would be great! · 3 years ago

Why not make this a wiki?? · 11 months, 1 week ago

Please add the latex for matrices and determinants.Thankyou · 1 year, 5 months ago

I want to suggest a correction for the Parentheses section.

$$\backslash\{$$ and $$\backslash\}$$ are used for the curly brackets: $$\{a+b\}$$

Note that not giving the slash makes the parentheses disappear when the $$\LaTeX$$ output is rendered. · 1 year, 10 months ago

{a and c} · 1 year, 2 months ago

I'm not sure how your reply is relevant to my comment. You haven't used $$\LaTeX$$. You just wrote it in plain text. My comment illustrated how braces aren't rendered in $$\LaTeX$$ output if you don't escape it using a backslash.

If you're typing in plain text, then there's no need to escape it since plain text is rendered as it is in output. · 1 year, 2 months ago

Can you write the symbol for infinity in Latex if so how ? · 2 years, 3 months ago

\infty @Abdur Rehman Zahid · 2 years, 3 months ago

Thanks · 2 years, 3 months ago

Yes, if you could put all the produced results first and then the HOW-TOs, that'd be great. It'd be like a LaTeX dictionary. The way it is now is hard to skim through with an eye to find the thing you want in the nexus of information.

A great guide, by the way. · 2 years, 4 months ago

Awesome note for all learners ! $$\LaTeX$$ is truly useful and the following wikipedia page is also helpful for this purpose.

What I want to add in this note is the $$\LaTeX$$ colors , I try to use them in $$\color{Red}{problems}$$ and $$\color{Green}{Solutions}$$

For that , you have to type

For example, " \color{Green}{Maths} " will appear as $$\color{Green}{Maths}$$

" \color{Blue}{Maths} " will appear as $$\color{Blue}{Maths}$$...

Also the use of " \Huge" , it is used for getting big fonts, like

" \Huge{Maths}" will appear as $$\Huge{Maths}$$

@Daniel Liu , try getting this in the note too ..... · 2 years, 6 months ago

$$\mathbb{\Huge{\color{MidnightBlue}{How \text{ }To \text{ } Swear\text{ } In\text{ } Mathematics, \sqrt{-1}}}}$$

Wow really cool! :) · 2 years, 5 months ago

$$\Huge\color{green}{NICE}$$
How did you changed the font?? · 1 year, 5 months ago

$$\Huge{\text{Aditya}}{\text{Raut}}$$ Wow! This is cool!!@Aditya Raut · 2 years, 2 months ago

Nice !

For posting solutions , I prefer the following pages :

Hope that helps ! :3 · 3 years ago

Nice · 3 years ago

Another suggestion: \oint for surface integral ($$\oint$$). · 3 years ago

Hmm... I said \oint was for line integral in the Calculus section. Surface integral, line integral, same thing. · 3 years ago

A note on integrals in $$\LaTeX$$: [[ $$\mbox{\iiint}$$ ]] gives $\iiint$ It can also be written as [[$$\mbox{\int \! \! \! \! \int \! \! \! \! \int}$$]], giving $\int \!\!\!\! \int \!\!\!\! \int$ While this is unncessary in Brilliant, it is used in actual $$\LaTeX$$ editors when the "esint" package (which contains \iiint) is not available.

Here, the symbol [[ $$\mbox{\!}$$ ]] removes a certain space between two characters. · 1 year, 4 months ago

There is a typo the line just above "Tables and Arrays". In Fitting Parentheses
display is an error. \left. \dfrac{x^3+2x}{3x^2}\right|_0^3 should give $$~~~~\color{red}{ \large \ \left. ~~\right |_0^3}$$ · 1 year, 6 months ago

THIS IS AWESOME! HUHUHUHU · 2 years, 5 months ago

Yeah. :D · 2 years, 5 months ago

Hey, what course are you in? And we're batchmates, I reckon. · 2 years, 5 months ago

Civil Engineering. :) And you're Journalism, right? :D

Sorry, I don't understand your use of the word "batchmates". XD · 2 years, 5 months ago

2012? :) · 2 years, 5 months ago

Nope, 2013. :) · 2 years, 5 months ago

Na-feel ko nga kasi 17 ka haha · 2 years, 5 months ago

:)))

Take note lang ha, 'di tayo parehas ng high school. Wala lang sinabi ko lang haha XD · 2 years, 5 months ago

Of course, I know. Kilala sana kita if oo. :) · 2 years, 5 months ago

This site is a good way to get off the ground quickly with all the different symbols: http://www.codecogs.com/latex/eqneditor.php Staff · 2 years, 10 months ago

Excellent! I suggest adding matrices. · 3 years ago

I added tables and arrays, that will probably suffice for making matrices too. · 3 years ago

Hmm... The link isn't to this post though. Probably a glitch. I explicitly posted the link. · 3 years ago

I suppose that works too. This is a really great post. · 3 years ago

What about lesser than equal to? · 2 months ago

\le will give you $$\le$$ · 2 months ago

Thanks · 2 months ago

@Ali Hamaiz Here is the note I was talking to you about. · 8 months, 1 week ago

How about ---> · 11 months, 1 week ago

\rightarrow gives $$\rightarrow$$.

If you want a longer one, affix "long". Thus, \longrightarrow gives $$\longrightarrow$$. · 11 months, 1 week ago

Thank you kuya Jaydee :) See you in automathic · 11 months, 1 week ago

Comment deleted Aug 30, 2015

[What you want the link to say] (The URL that you want to link to)

Don't add the space between them. · 1 year, 4 months ago

@Trevor B. Can you tell me how to change the size of image in latex? · 1 year, 4 months ago

While I don't know how to do that in Brilliant, you can import an image from the graphics package and set the size you want with [length=x cm] after \includegraphic. · 1 year, 4 months ago

The $$\LaTeX$$ code for $$\infty$$ is \infty. · 1 year, 7 months ago

I am trying it from many days and still not able to do so.

[Brilliant](http://www.brilliant.org) gives you Brilliant. Since this is a Markdown feature and not a $$\LaTeX$$ feature, don't enclose it in slash brackets as you do with math code.

Basically, the syntax is [hyperlink_text](url_to_page).

Here's a screenshot of output corresponding to Markdown code for ease of understanding:

Image

$$~~~\large\overset{\textrm{output}}{\implies}~~~$$

Image

with the hyperlink directing you to the specified url. · 1 year, 4 months ago

For eg. $\left(\large \cfrac{a+b}{c+\cfrac{d}{e+f}}\right)$

Here,brackets are not able to cover up the whole expression..
Thanks,now it's working. · 1 year, 4 months ago

Use \left before opening bracket and \right before closing bracket to make the brackets auto-resize themselves to cover up the entire expression.

The basic syntax for the type of brackets you need is $$\text{\left(}\cdots\text{\right)}$$ as opposed to the normal bracketing $$\text{(}\ldots\text{)}$$. · 1 year, 4 months ago

Thanks a lot.... · 1 year, 4 months ago

Thank you for your help · 1 year, 7 months ago

What is wrong with this latex????

[3^{$$4n-3$$}] · 1 year, 7 months ago

$3^{4n-3}$ I think it is OK see my Latex code. · 1 year, 7 months ago

$$\text{your text here}$$ · 1 year, 8 months ago

Aditya Chauhan $$\text{your text here}$$ You have to put the $$\backslash ( \backslash )$$ around the Latex · 1 year, 5 months ago

Thanks... · 1 year, 8 months ago

$${sec}^{2} \theta + 16{sec}^{2} \phi + 49{sec}^{2} \delta + 8\sec \theta \sec \phi + 56\sec \phi \sec \delta + 14\sec \theta \sec \delta$$ · 1 year, 10 months ago

Use \sec^2 \delta for $$\sec^2 \delta$$ · 1 year, 4 months ago

For i = 1 , 2 ,$$\cdots$$, n , let $$a_{i}$$ and $$b_{i}$$ be non-negative real numbers. Then $$\left( a_{1} + a_{2}+\cdots + a_{n}\right)$$ $$\left( b_{1}+ b_{2} +\cdots + b_{n}\right)$$ $$\geq$$ $$\left( \sqrt{a_{1}b_{1}} +\sqrt{a_{2}b_{2}} +\cdots +\sqrt{a_{n}b_{n}} \right) ^{2}$$ · 2 years ago

$$\Huge{Brilliant\;Is\;So\;Awesome\;!!!}$$ · 2 years, 2 months ago

Comment deleted Feb 06, 2015

$$\Huge{I like Brilliant} \\$$ I think you wanted this. You missed starting with \ ( and ending with \ )....no space after a \, I had to do it for technical reason. · 2 years, 3 months ago

thank you · 2 years, 3 months ago

$$\text{your text here}$$ · 2 years, 4 months ago

$$\text{awesome post}$$ · 2 years, 4 months ago

[@Daniel Liu ], How do I denote vectors by latex? · 2 years, 5 months ago

@Abhimanyu Swami Here's your query ...type this \stackrel{rightarrow} v and you get this

$$\huge{ \stackrel{\rightarrow} v}$$ and you might also want.. $$\huge{\stackrel{\rightarrow}{|v|}}$$. · 2 years, 3 months ago

$$\stackrel {\rightarrow} { v^2}$$ .......This is what I get with \stackrel {\rightarrow} { v^2} · 2 years, 3 months ago

Srry put a slash before the rightarrow word I mean \stackrel{\rightarrow}{v} you'll get this time .

Arya · 2 years, 3 months ago

Thanks. With the correction and adding {v^2} with in { } that is.....
\stackrel {\rightarrow} { v^2} ..gives :- $$~~~~~~~~~~~~~~ \\ \stackrel {\rightarrow} { v^2}$$ · 2 years, 3 months ago

$$\begin{array}{l|c|r}\huge Normal~Vectors \\\hline\end{array}$$

Use \vec{v} for $$\huge\displaystyle\vec{v}$$

$$\begin{array}{l|c|r}\huge Unit~Vectors \\\hline\end{array}$$

Use \hat{\imath}\;\;\hat{\jmath}\;\;\hat{k} for $$\huge\hat{\imath}\;\;\hat{\jmath}\;\;\hat{k}$$

\imath' and\jmathgets rid of the the dot overiandj. · 1 year, 4 months ago

Also, what's the latex for putting a black square around the answer when you're writing solutions. · 2 years, 5 months ago

\boxed { }

@Daniel Liu There are lots of symbols on the AoPS page you linked to, but there is some $$\LaTeX$$ stuff you should definitely add, like systems of equations (we use \begin{cases} .. \\ ... \\ ..\end{cases} for this) and \boxed { }. These don't exist on the AoPS page.

I also like to use \stackrel { } to get some text shown above symbols.

E.g. \stackrel{\text{AM-GM}}\ge gives $$\stackrel{AM-GM}\ge$$. This is optional, though. · 2 years, 5 months ago

What's the code for =>, not $$\geq$$ · 2 years, 5 months ago

If you mean an arrow, there are quite a few codes for it: \implies or \Rightarrow or \rightarrow or \Longrightarrow or \to or \longrightarrow or \mapsto or \longmapsto. · 2 years, 5 months ago

thank you, the first one was the one I was looking for · 2 years, 5 months ago

I find this note very, very nice! :D

I have a question: How should I write the definition of absolute value using LaTeX? · 2 years, 5 months ago

The best is simply the symbol | on your keyboard. For division there's a better one, though - /mid. · 2 years, 5 months ago

But how about the brace { used for piecewise defined functions? The definition of absolute value uses that :) · 2 years, 5 months ago

You'd use the same latex that you'd use for systems of equations.

f(x) = \begin{cases} 1 \\ 2 \end{cases} gives $$f(x) = \begin{cases} 1 \\ 2 \end{cases}$$

Put what you want between \begin{cases} and \end{cases} and separate new lines with \\. · 2 years, 5 months ago

Oh, that's nice. :) Thanks. :) · 2 years, 5 months ago

When NOT using "\text " while in Latex,
for " space " we can use "~".

Say:-In Latex.....>\ ( (I~am~~~coming~~~~) \ ) gives:-
(I#am###coming####)...... "#" stands for space here. · 2 years, 6 months ago

One more thing, for summation and production, it's required to put curly brackets { } between $$n$$ if you have more than 1 characters on $$n$$. Otherwise it'll show as $$\displaystyle\sum_{i=0}^2014 i$$ instead of $$\displaystyle\sum_{i=0}^{2014} i$$. (Note that other brackets don't work.) · 2 years, 6 months ago

One question how did you make "LATEX" look like that . · 2 years, 6 months ago

\LaTeX · 2 years, 6 months ago

Thanks man. Been looking for something like this. · 2 years, 6 months ago

How to write Pi in latex? · 2 years, 10 months ago

Use \pi

$$\pi$$ · 2 years, 10 months ago

Something I never got around to asking here is, how do you get the light grey line to denote section breaks? When I add a section break, I put \text{............................................................................................................} between the display delimiters, but I never figured out how to automate that with the grey lines. · 2 years, 10 months ago

by putting three or more underscores in a row. like this: _

· 2 years, 10 months ago

Can you explain a little bit more about the above $$\LaTeX$$ use

and what about squaring the mod of a vector I mean

$$\huge{\stackrel{\rightarrow}{|v|}}$$

if I try to square it then it becomes either $$\huge{\stackrel{\rightarrow}{|v|^2}}$$ or $$\huge{{\stackrel{\rightarrow}{|v|}^2}}$$ · 2 years, 3 months ago

Use \huge{\left|\vec{v}\right|}^2 for $${\left|\vec{v}\right|}^2$$ · 1 year, 4 months ago

See how it is written here by putting cursor over it. .

$$| \vec v|^2$$ · 2 years, 3 months ago

---` $$should~give :\!-$$

· 1 year, 4 months ago

Are geometry diagrams made with latex? How? · 2 years, 10 months ago

No. Geometric Diagrams are made with a typesetting language called Asymptote Vector Graphics Language. · 2 years, 10 months ago

Nope. · 2 years, 10 months ago

This is really helpful, thanks a lot Daniel!! · 2 years, 10 months ago

May I ask how can I create tables in LaTeX? · 3 years ago

I have written the guide to tables and arrays. At first I thought that I shouldn't write it because this was a basic latex guide, but since you asked for it, I put it on. See if you can understand what I wrote, and if you can't you can tell me why and I will change it. · 3 years ago

Yup! I understood! Thanks a lot!!! :) · 3 years ago

Thanks Daniel. · 3 years ago

Just one thing that's quite common: $$a \mid b$$ for divisibility use \mid to create the line. Other than this, the post is great! Thanks for it! :) · 3 years ago

Thanks! Added to Modular Arithmetic. · 3 years ago

$$1+2+3=6$$ · 2 years, 3 months ago

Comment deleted Feb 06, 2015

@Abdur Rehman Zahid Enclose it in \ ( \ .....\ ) but don't leave spaces · 2 years, 2 months ago