I use {align*} a lot, it seems that the block of {align*} are automatically centered. How could I move the block to the left margin?
[Tex/LaTex] How to move the whole block of {align*} to the left
amsmathequationspositioning
Related Solutions
use it this way:
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{align}
u(x+\Delta x, t) &= u(x,t) +\frac{\partial u(x,t)}{\partial x}\Delta x +\frac{\partial u(x,t)}{\partial t}(t-t) + \frac12\frac{\partial^2 u(x,t)}{\partial x^2}(\Delta x)^2 \\
& \qquad + \frac{\partial^2u(x,t)}{\partial x\partial y}(t-t)(\Delta x)^2 + \frac12\frac{\partial u(x,t)}{\partial^2t}(t-t)^2 \\
& \qquad +(...)\Delta x^3 +(...)\Delta x^4
\intertext{Seeing powers of t dropping in expansion around $x\pm\Delta x$}
u(x-\Delta x, t) &= u(x,t) -\frac{\partial u(x,t)}{\partial x}\Delta x + \frac12\frac{\partial^2 u(x,t)}{\partial x^2}(\Delta x)^2 -(...)\Delta x^3 +(...)\Delta x^4\\
& \left[\frac12\frac{\partial^2 u(x,t)}{\partial x^2}(\Delta x)^2+ \frac12\frac{\partial^2 u(x,t)}{\partial x^2}(\Delta x)^2\right] \\
& = u(x-\Delta x, t) + u(x+\Delta x, t) - u(x,t) - u(x,t) + O(\Delta x^4)
\intertext{Odd powers of $\Delta x$ cancelling eachother}
\frac{\partial^2 u(x,t)}{\partial x^2} &= \frac{u(x-\Delta x, t) + u(x+\Delta x, t) - 2u(x,t)}{\Delta x^2} + O(\Delta x^2)
\end{align}
\end{document}
One option will be to use
\usepackage[fleqn]{amsmath}
On the other hand, this option ([fleqn]) can be passed to \documentclass also as
\documentclass[fleqn]{article}
\usepackage{amsmath}
The MWE will be
\documentclass{article}
\usepackage[fleqn]{amsmath}
\usepackage{txfonts}
\usepackage{showframe}% to show frames
\begin{document}
\begin{equation}
\begin{aligned}
\text{Minimize } & x_1+x_2+x_3 \\
\text{Subject to} &\\
& x_1+x_2 \leq 10 \\
& x_2+x_3 \leq 8 \\
& x_1+x_3 \leq 5
\end{aligned}
\end{equation}
\end{document}
The output will be
But all the equations in the document will be left aligned by this approach.
The equation environment will put the equation in display mode by definition. To space only one equation left aligned, as you wish, one way is to use \phantom as below:
\documentclass{article}
\usepackage{amsmath}
\usepackage{txfonts}
\usepackage{showframe}% to show frames
\begin{document}
\begin{equation}
\begin{aligned}
\text{Minimize } & x_1+x_2+x_3 \\
\text{Subject to} &\\
& x_1+x_2 \leq 10 \\
& x_2+x_3 \leq 8 \\
& x_1+x_3 \leq 5
\end{aligned}
\phantom{\hspace{6cm}} %%<---adjust the value as you want
\end{equation}
\end{document}
Best Answer
Use the
flalignoption to get left