Welcome to Minimal Mistakes
This is the first post on the new Jekyll site.
1. Inline Math
To display a formula inside a sentence, wrap it in single dollar signs: The definition of the derivative is $\lim_{h \to 0} \frac{f(x+h) - f(x)}{h}$.
2. Block Equations
To display a formula on its own line centered, use a block with double dollar signs:
$$
x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}
$$
3. Calculus
$$
\int_{a}^{b} x^2 \,dx = \left[ \frac{x^3}{3} \right]_{a}^{b}
$$
4. Matrices
$$
A = \begin{pmatrix}
1 & 2 & 3 \\
4 & 5 & 6 \\
7 & 8 & 9
\end{pmatrix}
$$
5. Multi-line Systems (Aligned at the ‘=’ sign)
$$
\begin{aligned}
3x + 2y &= 10 \\
x - y &= 5
\end{aligned}
$$
6. Piecewise Functions
$$
f(x) =
\begin{cases}
x^2 & \text{if } x < 0 \\
x & \text{if } x \ge 0
\end{cases}
$$