LaTeX
LaTeX is a typesetting language used primarily to type mathematical expressions in an elegant fashion. For example, without LaTeX, 
would have to be written as 35/137.
Contents
Useful Codes
\boxed{Answer} produces a box around your Answer.
\frac{a}{b} produces a fraction with numerator 
and denominator 
. 
^\circ produces the degrees symbol. 
\text{Your Text Here} produces text within LaTeX. 
.
\mbox{Your Text Here} Produces text within LaTeX
\sqrt{x} produces the square root of 
. 
\sqrt[n]{x} produces the 
th root of . ![$\sqrt[n]{x}$](http://latex.artofproblemsolving.com/0/2/d/02d35112ae0400463779b8c3320f3bc597d81374.png)
a\equiv b \pmod{c} produces is equivalent to mod 
. 
See Modular Arithmetic
\binom{9}{3} produces 9 choose 3.
{n}\choose{r} produces n choose r. 
x^{y} produces x to the power of y. 
x_{y} produces x with y in subscript. 
\rightarrow produces an arrow to the right. 
\leftarrow produces an arrow to the left. 
\uparrow produces an arrow pointing upwards. 
\downarrow produces an arrow pointing downwards. 
\updownarrow produces an arrow pointing up and down. 
\ge produces a greater than or equal to sign. 
\le produces a less than or equal to sign. 
\not> produces a not greater than sign. 
\not< produces a not less than sign. 
\not\ge produces a not greater than or equal to sign. 
\not\le produces a not less than or equal to sign. 
\neq produces a not equal to sign. 
\infty produces an infinity sign. 
\perp produces a perpendicular sign. 
\angle produces an angle sign. 
\triangle produces a triangle. 
\ldots produces three dots at the bottom of a line (ellipsis). 
\cdots produces three dots in the middle of a line (as in a series sum or product). 
\times produces an 
as used in multiplication
\otimes produces a 
Also note that you do not have to use braces, "{" and "}", when you only want one character in the operation.
Examples
- x^y is the same as x^{y}.
- x_y is the same as x_{y}.
- BUT x^10 is not the same as x^{10}.
instead of 
.
instead of 
.Fonts
Font families
- Roman (default): \textrm{...}
- Sans-serif: \textsf{...}
- Monospace (typewriter): \texttt{...}
Font sizes
To activate a font size, write '{\tiny{This text is tiny}}', for example.
- \tiny (5 pt.)
- \scriptsize (7 pt.)
- \footnotesize (8 pt.)
- \small (9 pt.)
- \normalsize (10 pt.)
- \large (12 pt.)
- \Large (14 pt.)
- \LARGE (18 pt.)
- \huge (20 pt.)
- \Huge (24 pt.)
Font styles
- Bold \textbf{...}
- Italics \textit{...}
- Slanted \textsl{...}
- Small capitals \textsc{...}
- Sans-serif \textsf{...}
- Monospace \texttt{...}
- Emphasis \emph{...}
See also
- Asymptote (graphics language for LaTeX]]
External links
- AoPS LaTeX Help Index
- Wikipedia Article
- This is a useful site that will change LaTeX input into a PNG image.
