122k views

label multiple lines of equations [duplicate]

Suppose I have the equations \begin{align} f(x) = x^2 g(x) = \exp( x ) \end{align} I would like to use on single label for these lines, and ideally the equation number would be placed vertically ...
636 views

How to give two equations the same equation number? [duplicate]

I want to write two equations in consecutive lines and I want to give them a single equation number. Often, in notebooks, we write multiple equations in consecutive lines and use a big } sign to ...
361 views

Label a block or systems of equations with one label [duplicate]

Possible Duplicate: How to get only one vertically centered equation number in align environment with two equations I have a big system of equations which I want to label as one block. I do want ...
478 views

How to make an align environment with multiple equations per line and one equation reference? [duplicate]

I would like to use an align environment with a single equation number but with multiple equations per line. For example, the following two pieces of code work: begin{align} a&= 1 & b&= 2 ...
38 views

How to number two-line function definitions [duplicate]

Lets say we have a two line function definition, for example, a translation \begin{align} t_{p,q}\text{ : }&\mathbb{R}^2 \longrightarrow \mathbb{R}^2 \\ &(x,y) \longmapsto (x+p, y+q) \...
224k 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}
138k views

align* but show one equation number at the end

I am using align*, but I still need an equation number. I know one solution is to use align and add \nonumber to all lines but the last. Is there a 'lazy' way to do it? I searched a little and found ...
7k views

How can I number a few equations together

i would like to write few equations, but all the equations will get only once numbered and in the middle (right side) of the equations. e.q. if i write 3 equations, the number will be to the right of ...
38k views

How can I label only one line of an equation array?

Consider the following commands to create a labelled multi-line equation array: \begin{eqnarray} \label{eqn:1} X&=&Y+Z\\ &\leq & U \times W. \end{eqnarray} It creates a two-line ...
16k views

Systems of equations with a single number

I want to write a numbered system of equations. Right now, this is what I do and I am satisfied with the output, but I have a feeling it's not the best way to do it. \begin{array}{...
398 views

How to align 'parts' of these equations?

I have a set of equations given by the following code: $$\label{eqn:eraserStart} \max \, d$$ $$a_t \in \{0,1\} \, \forall t \in T$$ \...
336 views

Equation broken into two (centered) lines with equation number in the middle of both lines

I would like to know how to break a long equation into two lines and have both lines centered. Besides, I would like to have only one equation number in the middle of both lines. Here's a MWE: \...
105 views

Problem getting my equation alignment / numbering right

I've struggled to get my alignment look nice for quite a time now. After a lot of googling I have finally achieved almost what I want: Now the problem is the equation numbers (1 and 3 in the example),...