Having two or more matrices centered on one line

Question

I have the following code:

$$A = \begin{bmatrix} 0 & 1 \\ 1 & 0 \end{bmatrix} $$ and $$B = \begin{bmatrix} 0 & 0  \\ 0 & 0 \end{bmatrix} $$.

But this is displayed on two lines. How can I make these matrices as well as text appear on the center of the page, all in one line?

Answer 1

Use \text to write text within displayed math. However, you'll have to handle the spacing inside the \text command, since spacing is ignored in math mode. Also, you'd want to move the final period inside the display math, to prevent it from appearing on a new line.

$$A = \begin{bmatrix} 0 & 1 \\ 1 & 0 \end{bmatrix}\text{ and }
  B = \begin{bmatrix} 0 & 0 \\ 0 & 0 \end{bmatrix}.$$

If you want more space between the matrices, try \quad\text{and}\quad.

(Note: you'll get slightly better spacing if you use \[ and \] to begin/end display math instead of $$.)

Answer 2

You probably want (amsmath package is used):

\[
A = \begin{bmatrix} 0 & 1 \\ 1 & 0 \end{bmatrix} \text{ and }B = \begin{bmatrix} 0 & 0  \\ 0& 0 \end{bmatrix} 
\]