4.3 Examples

Equations within text paragraphs, y = x2, √ ------- a2 − b2, are bracketed like that: $ y = x^2 $ or \( \sqrt{a^2 - b^2} \).

If they are displayed, i.e. separated from the text,

[( x2 ) ] ---− 1 + sin2 𝜃 = lnx, n
( ) λ 1- Λ = Γμν + O x ,

53 Etot = 1.5 ⋅ 10 erg, (1 )
use
$$  
\left[ \left( \frac{x^2}{n} - 1 \right) + \sin^2 \theta \right] =  
   \ln x,  
$$  
\begin{displaymath}  
\Lambda = {\it \Gamma}^\lambda_{\mu \nu} + \mbox{\it O} \left(  
   \frac 1{x} \right),  
\end{displaymath}

which generates equations without numbering, while

\begin{eqnarray}  
E_{\mbox{\scriptsize tot}} = 1.5 \cdot 10^{53} \mbox{erg},  
\label{equation:momentum}  
\label{epubtk:eq1}\end{eqnarray}

displays equations numbers.

We recommend to use the LATEX display style for separated equations

( 2 ) ∫ b 1-∂--x + 1 = xdr, (2 ) x2 ∂t2 a
\begin{eqnarray}  
\left( \frac 1{x^2} \frac{\partial^2 x}{\partial t^2} + 1  
   \right) = \int_a^b x dr,  
\label{equation:flux}  
\label{epubtk:eq3}\end{eqnarray}

and text style for inline equations like ∫ b x∕y = a xdr:
$ x / y = \int_a^b x dr $. This can also be enforced by \displaystyle and \textstyle resp.


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