# LaTeX quick guide

am noob, tutorials too long. Quick guide?

$$x + y$$

$$x + y$$


Inline $$x + y$$ with text

Inline $x + y$ with text


$$a \leq \frac{b}{c}$$

$$a \leq \frac{b}{c}$$


$$y[n] = \sum_{k=0}^{m} b_k$$

$$y[n] = \sum_{k=0}^{m} b_k$$


$$\mathbf M = \begin{pmatrix} 1 & 2 & \pi \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{pmatrix}$$

$$\mathbf M = \begin{pmatrix} 1 & 2 & \pi \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{pmatrix}$$


$$\int_{-\infty}^{\infty} \hat\psi_{a,b}(\omega) d\omega, \omega \in \mathbb{R}$$

$$\int_{-\infty}^{\infty} \hat\psi_{a,b}(\omega) d\omega, \omega \in \mathbb{R}$$


Greek Alphabet

Math symbols

$$f(n) = \begin{cases} n/2, & \text{if n is even} \\ \sqrt{3n+1}, & \text{if n is odd} \end{cases}$$

$$f(n) = \begin{cases} n/2, & \text{if n is even} \\ \sqrt{3n+1}, & \text{if n is odd} \end{cases}$$


\begin{align} 5 &= 0.5^{-1} + 3 \\ &= 2 + 3 \\ &= \boxed{5} \tag{1}\label{1} \\ \end{align}

\begin{align} 5 &= 0.5^{-1} + 3 \\ &= 2 + 3 \\ &= \boxed{5} \tag{1}\label{1} \\ \end{align}


And in $$\eqref{1}$$ we see that the result is five.

And in $\eqref{1}$ we see that the result is five.


MathJax reference --  omitted below

$$\mathbf I = \begin{pmatrix} 1 & 0 & \cdots & 0\\ 0 & 1 & \cdots & 0 \\ \vdots & \vdots & \ddots & \vdots \\ 0 & 0 & \cdots & 1 \end{pmatrix}$$

\mathbf I =
\begin{pmatrix}
1      & 0      & \cdots & 0\\
0      & 1      & \cdots & 0 \\
\vdots & \vdots & \ddots & \vdots \\
0      & 0      & \cdots & 1
\end{pmatrix}


$$\cos(\omega_0 t) \Leftrightarrow \pi \delta(|w| - \omega_0)$$

\cos(\omega_0 t) \Leftrightarrow \pi \delta(|w| - \omega_0)

• Feel free to add stuff here, I rather keep the main answer simple Sep 5 at 9:53