Mini HOWTO  
On my website, to insert mathematics you have to use . For instance, let's say we wish to insert math within a sentence such as $F=ma$. This can be done by typing \$F=ma\$. Or, if you wish to display an equation by itself out of a sentence such as: $$ F=ma $$ Then, enclose the math expression within two dollar signs as follows:
$$
F=ma
$$
Greek Symbols
Greek symbols are generally written the way they are pronounced. Thus, $\theta$, $\xi$, $\psi$ can be written as \$\theta\$, \$\xi\$, and \$\psi\$ respectively. Capital Greek letters are written by uppercasing the first letter. Thus, $\Psi$, $\Theta$, and $\Xi$ are typeset as \$\Psi\$, \$\Theta\$, and \$\Xi\$.
Fractions
A fraction such as $$ c=\frac{a}{b} $$ should be coded as
c=\frac{a}{b}
A fraction within a fraction: $$ c=\frac{a+\frac{3}{2}}{b} $$ is coded as:
c=\frac{a+\frac{3}{2}}{b}
Subscripts and Superscripts
Subscripts and superscripts such as $$ a=b^{c+\frac{1}{2}}_{d+2} $$ should be written as:
a=b^{c+\frac{1}{2}}_{d+2}
Text within Equation
The text that appears within an equation such as $$ \phi= \frac{\textrm{performance}}{\textrm{price}} $$ should be written as:
\phi= \frac{\textrm{performance}}{\textrm{price}}
Integrals
An integral such as $$ \epsilon=\int_{x=0}^L \left( \frac{x}{5}-\frac{x^2}{2} \right) dx $$ should be coded as:
$$
\epsilon=\int_{x=0}^L \left( \frac{x}{5}-\frac{x^2}{2} \right) dx
$$
Sums
The sum of a series $$ s=\sum_{i=1}^N (b-a)^i $$ should be coded as
s=\sum_{i=1}^N (b-a)^i
03.04.18
Large Brackets
Say we want to enclose a fraction within parentheses or brackets. This can be done by preceding the parenthese/bracket with the code \left or \right. For example: $$ a=\left[\frac{\partial F}{\partial x}+\frac{\partial G}{\partial y}\right] $$ The latter can be typeset as:
a=\left[\frac{\partial F}{\partial x}+\frac{\partial G}{\partial y}\right]
Numbered Equations
If you wish to write an equation with an equation number as follows: \begin{equation} F=ma \tag{23a} \label {eqn:newton} \end{equation} Type the following:
\begin{equation}
F=ma
\tag{23a}
\label {eqn:newton}
\end{equation}
And reference it as Eq. (\ref{eqn:newton}) by typing
Eq. (\ref{eqn:newton})
09.05.18
Online Manuals
List of mathematical symbols:
https://oeis.org/wiki/List_of_LaTeX_mat ... al_symbols
You can learn more about on tug.org:
http://www.tug.org/tutorials/tugindia/chap11-scr.pdf
Or on hkbu.edu.hk:
http://www.math.hkbu.edu.hk/TeX/short-math-guide.pdf
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