507 views

### Is there an opposite to \nonumber? [duplicate]

Usually I set equations using the align environment together with \nonumber for those few lines that shall not have a number, or the align* environment if no equation shall be numbered. But what if ...
99 views

### How to reference long equations by numbered alphabets [duplicate]

I have 2 long equations when I want to label them as 2a and 2b by using subequation a problem occur that each line of equation n pdf gets number inspite of each equation so thats why i got more ...
231k views

### Show equation number only once in align environment

I want the equation number to be shown only at the last line, or better, somewhere in the middle of all. So instead of (1), (2), ... only (1). I use \begin{align} ... \end{align}
102k views

### How to get only one vertically centered equation number in align environment with two equations

What I have are two equations with align and I want one single equation number to refer to this system of equations. To illustrate, I have \begin{align} dr_t &= \kappa ( \theta - r_t ) dt + \...
6k views

### Long equation does not page break

I have a series of equations steps, about 20 lines or so. I would like to have it automatically decide page break when necessary, but it resists and always tries to stay in a whole page, rendering the ...
7k views

### How to add a line break in math mode but number the whole as one formula?

I am trying to get the following formula on two lines like this: W \in \mathbf{M}_N \rightarrow W' \in \mathbf{M}_{N+1}\\ (w_{ij})_{1\leq i,j\leq N} \mapsto (w_{ij})_{1\leq i,j\leq ...
246 views

### splitting middle equation of 2 rows

I have a very long equation which does not fit on the page and I am wondering if anybody can help me to align it properly. \begin{align*} &(q^1+q^3+q^5+q^7)(q^2+q^4+q^6+q^8) \\ &=q^{1+2}+q^{...
930 views

### Equation numbering inside align*

Consider: \begin{align*} &\begin{bmatrix} P_1 J&0\\0&NP_2\end{bmatrix}=\\&\begin{bmatrix}I&0\\0&N\end{bmatrix}\begin{bmatrix}P_1&0\\0& P_2\end{bmatrix} \begin{bmatrix}...
192 views

### How use “align” but with numeration of just some equation?

How use "align" but with numeration of just some equation ? For example, \begin{align} f(x)&=P(x)\\ &= Q(x)\\ &=R(x) \end{align} will numerate all equation. How can I do if I want to ...
2k views

### Tagging multi line equations

Often I have a chain of equations but later on I only want to refer that the first statement is equal to the last one. There are some options to do that: \begin{align} \label{equation} a ...
896 views

### label \theequation inside math

Code: \documentclass{article} \usepackage[utf8]{inputenc} \usepackage{amsmath} \begin{document} \begin{align*} J &= J_0 + 2 m r^2 & \label{eq:asdf}\refstepcounter{...
315 views

### Multiline equation, label once and support page break

I want a multiline equation that labeled once and support page break. If I choose \begin{align}\begin{split} balabala\\ balabala \end{split}\end{align} then the split makes it unable to support ...
387 views

### Prevent multiple equation numbers when using \allowdisplaybreak with align

I have a very long equation of the following format \begingroup \allowdisplaybreaks \begin{align} a &= very long expression here\\ + & another long expression here\\ + & another long ...