# What is the proper way to center a math condition in its own line?

I have a condition of the form $E1$ and $E2$, where E1 and E2 are long expressions. The condition is important and I've put it into its own line with the align environment. See the snippet below.

\begin{align*}
E_1~\text{ and }~E_2.
\end{align*}


The problem is that there is too little space between the word and and the two expressions. What's the best way to handle this? I'd like to avoid adding many ~'s; I could use & (i.e. E_1 &~&\text{ and }&~& E_2) but that puts E1 to the far left, and to the center, and E2 to the far right.

Single line displays should always use  not align* so I would possibly use \[ E1 \qquad \text{and} \qquad E2

• What about equation* vs. \[? – blazs Mar 2 '16 at 16:50
• @blazs what about it, by default latex only defines \[ equation* is defined by the amsmath package to be the same as \[ – David Carlisle Mar 2 '16 at 17:23