Unite Equation Notification For Free

You should only number equations that you are going to refer back. Most people are not very consistent. But now there are LaTex packages that do exactly that. See this post.

You have to wrap your equation in the equation environment if you want it to be numbered, use equation* (with an asterisk) otherwise. Inside the equation environment, use the split environment to split the equations into smaller pieces, these smaller pieces will be aligned ingly.

#LaTeXTip: remove equation numbering for separate lines by adding ?\notag? before \\ in the align environment. Use \begin{align*} and \end{align*} to switch off numbering entirely.

If we use the gather environment, every equation is centered. If we use the align environment and insert an & on every line where we wish the equations to be aligned (usually at some sort of equality symbol), the equations will be aligned.

If you want LaTeX to automatically number or re-number equations in a document you should insert the text ?\label{EqLabel}? after the equation and inside the equation environment, where ?EqLabel? is any label you choose, possibly to help you to remember the equation, e.g.

You can use \notag or \nonumber to prevent individual equations from being numbered, and \tag{} can be used to override the usual equation number with your own symbol instead (or to add an equation tag even when automatic numbering is off).

Multiple Equations If we use the gather environment, every equation is centered. If we use the align environment and insert an & on every line where we wish the equations to be aligned (usually at some sort of equality symbol), the equations will be aligned.