方程组性态与条件数

\[E = mc^2 \]

\begin{equation}
e^{i\pi}+1 = 0
\end{equation}

\( E = mc^2 \)

\begin{cases} \dot{x}&=\mathbf{A}x+\mathbf{B}u\\ y&=\begin{bmatrix}1&0\\ 0&1\end{bmatrix}x+\begin{bmatrix}1&0\\ 0&1\end{bmatrix}u \end{cases}

--- > qwrqxcvx 1. 1. sdf

header 1	header 2
row 1 col 1	row 1 col 2
row 2 col 1	row 2 col 2
考虑线性方程组

E = mc^2

\[\boldsymbol{A{}x} = \boldsymbol{b}, \]

其中，\(\boldsymbol{A}\in \mathbb{R}^{n\times n}\) 非奇异，\(\boldsymbol{b}\in \mathbb{R}^{n}\), 且~\(\boldsymbol{b}\ne \boldsymbol{0}\).
\begin{equation*}E = mc^2 \end{equation*}

\begin{align}\notag \dot{x}&=\mathbf{A}x+\mathbf{B}u\\ y&=\begin{bmatrix}1&0\\ 0&1\end{bmatrix}x+\begin{bmatrix}1&0\\ 0&1\end{bmatrix}u \end{align}