我的方程代码不接受 \\

Question

这个方程中的\\不成立。我不知道为什么。如果我使用它，\begin{bmatrix}它就会起作用。我不知道现在哪里出了问题。我想要解决的组中有四个方程。

\[
x = [1,0]^{T}\quad \Rightarrow x^{T}Ax = \alpha > 0,\\ 
x = [1,0]^{T}\quad \Rightarrow x^{T}Ax = \gamma > 0, 
\]    

Answer 1

\documentclass{article}
\usepackage{amsmath}    % <--- for advanced math

\begin{document}
With \verb+gather*+ 
\begin{gather*}
x = [1,0]^{T} \Rightarrow x^{T}Ax = \alpha > 0,\\
x = [1,0]^{T} \Rightarrow x^{T}Ax = \gamma > 0,
\end{gather*}
or \verb+gather+ when you like to have numbered equations
\begin{gather}
x = [1,0]^{T} \Rightarrow x^{T}Ax = \alpha > 0,\\
x = [1,0]^{T} \Rightarrow x^{T}Ax = \gamma > 0,
\end{gather}
Similarly with \verb+align*+
\begin{align*}
x & = [1,0]^{T} \Rightarrow x^{T}Ax = \alpha > 0,\\
x & = [1,0]^{T} \Rightarrow x^{T}Ax = \gamma > 0,
\end{align*}
or you may like to have a numbered system of equation:
\begin{equation}
\begin{aligned}
x & = [1,0]^{T} \Rightarrow x^{T}Ax = \alpha > 0,\\
x & = [1,0]^{T} \Rightarrow x^{T}Ax = \gamma > 0,
\end{aligned}
\end{equation}
\end{document}

有关详细信息，请参阅维基百科：数学和/或维基百科：高等数学