A Quick Guide To LATEX

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A quick guide to LATEX
What is LATEX?

Text decorations

Lists

LATEX(usually pronounced “LAY teck,” sometimes “LAH
teck,” and never “LAY tex”) is a mathematics typesetting
program that is the standard for most professional
mathematics writing. It is based on the typesetting program
TEX created by Donald Knuth of Stanford University (his first
version appeared in 1978). Leslie Lamport was responsible for
creating LATEX a more user friendly version of TEX. A team of
LATEX programmers created the current version, LATEX 2ε.

Your text can be italics (\textit{italics}), boldface
(\textbf{boldface}), or underlined
(\underline{underlined}).
Your math can contain boldface, R (\mathbf{R}), or
blackboard bold, R (\mathbb{R}). You may want to used these
to express the sets of real numbers (R or R), integers (Z or Z),
rational numbers (Q or Q), and natural numbers (N or N).
To have text appear in a math expression use \text.
(0,1]=\{x\in\mathbb{R}:x>0\text{ and }x\le 1\} yields
(0, 1] = {x ∈ R : x > 0 and x ≤ 1}. (Without the \text
command it treats “and” as three variables:
(0, 1] = {x ∈ R : x > 0andx ≤ 1}.)

You can produce ordered and unordered lists.
description
command
output
\begin{itemize}
\item
• Thing 1
Thing 1
unordered list
• Thing 2
\item
Thing 2
\end{itemize}

Math vs. text vs. functions
In properly typeset mathematics variables appear in italics
(e.g., f (x) = x2 + 2x − 3). The exception to this rule is
predefined functions (e.g., sin(x)). Thus it is important to
always treat text, variables, and functions correctly. See the
difference between x and x, -1 and −1, and sin(x) and sin(x).
There are two ways to present a mathematical expression—
inline or as an equation.

Inline mathematical expressions
Inline expressions occur in the middle of a sentence. To
produce an inline expression, place the math expression
between dollar signs ($). For example, typing
$90^{\circ}$ is the same as $\frac{\pi}{2}$ radians
yields 90◦ is the same as π2 radians.

Spaces and new lines
LATEX ignores extra spaces and new lines. For example,
This
sentence will
look
fine after
it is
compiled.
This sentence will look fine after it is compiled.
Leave one full empty line between two paragraphs. Place \\ at
the end of a line to create a new line (but not create a new
paragraph).
This
compiles

Equations
Equations are mathematical expressions that are given their
own line and are centered on the page. These are usually used
for important equations that deserve to be showcased on their
own line or for large equations that cannot fit inline. To
produce an inline expression, place the mathematical
expression between the symbols \[ and \]. Typing
\[x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\] yields
√
−b ± b2 − 4ac
.
x=
2a

Displaystyle
To get full-sized inline mathematical expressions use
\displaystyle. Use this sparingly. Typing
I want this $\displaystyle \sum_{n=1}^{\infty}
\frac{1}{n}$, not this $\sum_{n=1}^{\infty}
\frac{1}{n}$. yields
∞
X
P
1
1
, not this ∞
I want this
n=1 n .
n
n=1

Images
You can put images (pdf, png, jpg, or gif) in your document.
They need to be in the same location as your .tex file when
you compile the document. Omit [width=.5in] if you want
the image to be full-sized.
\begin{figure}[ht]
\includegraphics[width=.5in]{imagename.jpg}
\caption{The (optional) caption goes here.}
\end{figure}

ordered list

like\\
this.
This compiles
like
this.
Use \noindent to prevent a paragraph from indenting.

Comments
Use % to create a comment. Nothing on the line after the % will
be typeset. $f(x)=\sin(x)$ %this is the sine function
yields f (x) = sin(x)

Delimiters
description
command
output
parentheses
(x)
(x)
brackets
[x]
[x]
curly braces
\{x\}
{x}
To make your delimiters large enough to fit the content, use
them together with \right and \left. For example,
\left\{\sin\left(\frac{1}{n}\right)\right\}_{n}^
{\infty}
produces
  
∞
1
sin
.
n
n
Curly braces are non-printing characters that are used to
gather text that has more than one character. Observe the
differences between the four expressions x^2, x^{2}, x^2t,
x^{2t} when typeset: x2 , x2 , x2 t, x2t .

\begin{enumerate}
\item
Thing 1
\item
Thing 2
\end{enumerate}

1. Thing 1
2. Thing 2

Symbols (in math mode)
The basics
description
addition
subtraction
plus or minus
multiplication (times)
multiplication (dot)
division symbol
division (slash)
circle plus
circle times
equal
not equal
less than
greater than
less than or equal to
greater than or equal to
approximately equal to
infinity
dots
dots
fraction
square root
nth root
exponentiation
subscript
absolute value
natural log
logarithms
exponential function
degree

command
+
\pm
\times
\cdot
\div
/
\oplus
\otimes
=
\ne
<
>
\le
\ge
\approx
\infty
1,2,3,\ldots
1+2+3+\cdots
\frac{a}{b}
\sqrt{x}
\sqrt[n]{x}
a^b
a_b
|x|
\ln(x)
\log_{a}b
e^x=\exp(x)
\deg(f)

output
+
−
±
×
·
÷
/
⊕
⊗
=
6
=
<
>
≤
≥
≈
∞
1, 2, 3, . . .
1 + 2 + 3 + ···
a
b
√
x
√
n
x
ab
ab
|x|
ln(x)
loga b
ex = exp(x)
deg(f )

description
maps to
composition
piecewise
function

command
\to
\circ
|x|=
\begin{cases}
x & x\ge 0\\
-x & x<0
\end{cases}

output
→
◦
(
|x| =

x
−x

x≥0
x<0

command
\alpha
\beta
\chi
\delta
\epsilon
\varepsilon
\eta
\gamma
\iota
\kappa
\lambda
\mu
\nu
\omega
\phi
\varphi
\pi
\psi
\rho
\sigma

output
α
β
χ
δ

ε
η
γ
ι
κ
λ
µ
ν
ω
φ
ϕ
π
ψ
ρ
σ

command
\tau
\theta
\upsilon
\xi
\zeta
\Delta
\Gamma
\Lambda
\Omega
\Phi
\Pi
\Psi
\Sigma
\Theta
\Upsilon
\Xi
\aleph
\beth
\daleth
\gimel

command

derivative

\frac{df}{dx}

derivative

\f’
\frac{\partial f}
{\partial x}

output
τ
θ
υ
ξ
ζ
∆
Γ
Λ
Ω
Φ
Π
Ψ
Σ
Θ
Υ
Ξ
ℵ
i
k
‫ג‬

description
set brackets
element of
not an element of
subset of
subset of
not a subset of
contains
contains
union
intersection

command
\{1,2,3\}
\in
\not\in
\subset
\subseteq
\not\subset
\supset
\supseteq
\cup
\cap

big union

\bigcup_{n=1}^{10}A_n
\bigcap_{n=1}^{10}A_n

integral

\int

double integral

\iint

triple integral

\iiint

limits

\lim_{x\to \infty}

summation

\sum_{n=1}^{\infty}a_n

product

lim

x→∞
∞
X

an

n=1
∞
Y

\prod_{n=1}^{\infty}a_n

an

n=1

Logic
description
not
and
or
if...then
if and only if
logical equivalence
therefore
there exists
for all
implies
equivalent
output
{1, 2, 3}
∈
6∈
⊂
⊆
6⊂
⊃
⊇
∪
∩
10
[
An
n=1
10
\

output
∼
∧
∨
→
↔
≡
∴
∃
∀
⇒
⇔

description
vector
vector
norm

matrix

determinant

determinant
trace
dimension

command
\vec{v}
\mathbf{v}
||\vec{v}||
\left[
\begin{array}{ccc}
1 & 2 & 3 \\
4 & 5 & 6\\
7 & 8 & 0
\end{array}
\right]
\left|
\begin{array}{ccc}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 0
\end{array}
\right|
\det(A)
\operatorname{tr}(A)
\dim(V)

command
|
\not |
\operatorname{div}
\mod
\gcd
\lceil x \rceil
\lfloor x \rfloor

output
|
6|
div
mod
gcd
dxe
bxc

output
~v
v
||~v ||



1
 4
7

1
4
7

description
angle
degree
triangle
segment
sine
cosine
tangent
cotangent
secant
cosecant
inverse sine
inverse cosine
inverse tangent

command
\angle ABC
90^{\circ}
\triangle ABC
\overline{AB}
\sin
\cos
\tan
\cot
\sec
\csc
\arcsin
\arccos
\arctan

output
∠ABC
90◦
4ABC
AB
sin
cos
tan
cot
sec
csc
arcsin
arccos
arctan

Symbols (in text mode)

Linear algebra

An

∅
P
min
max
sup
inf
lim sup
lim inf
A

command
\sim
\land
\lor
\to
\leftrightarrow
\equiv
\therefore
\exists
\forall
\Rightarrow
\Leftrightarrow

description
divides
does not divide
div
mod
greatest common divisor
ceiling
floor

Geometry and trigonometry
ZZZ

n=1

\emptyset
\mathcal{P}
\min
\max
\sup
\inf
\limsup
\liminf
\overline{A}

output
df
dx
f0
∂f
Z∂x
ZZ

Set theory

big intersection

description

partial derivative

Greek and Hebrew letters

empty set
power set
minimum
maximum
supremum
infimum
limit superior
limit inferior
closure

Number theory

Calculus

Functions

2
5
8

2
5
8

det(A)
tr(A)
dim(V )


3
6 
0

3
6
0

The followign symbols do not have to be
signs.
description
command
dollar sign
\$
percent
\%
ampersand
\&
pound
\#
backslash
\textbackslash
left quote marks
‘‘
right quote marks ’’
single left quote
‘
single right quote
’
hyphen
X-ray
en-dash
pp. 5--15
em-dash
Yes---or no?

surrounded by dollar
output
$
%
&
#
\
“
”
‘
’
X-ray
pp. 5–15
Yes—or no?

Resources
TUG: The TEX Users Group
CTAN: The Comprehensive TEX Archive Network
Handwriting-to-LATEX sites: Detexify, WebEquation
The Comprehensive LATEX Symbol List
The Not So Short Introduction to LATEX 2ε
Software that generates LATEX code: Mathematica, Maple,
GeoGebra
LATEX for the Mac: MacTEX
LATEX for the PC: TEXnicCenter and MiKTEX
LATEX online: ShareLaTeX, Overleaf, Sage
LATEX integration with Microsoft Office, Apple iWork, etc:
MathType, LATEXiT
Dave Richeson, Dickinson College, http://divisbyzero.com/



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