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I am new to TeX and am using scribtex to write a maths paper. When I put the followng code, the equation number is automatically displayed on the left, instead of in the right as is usually done. What is the problem and how do I fix it? Thanks for your time.

 \documentclass[12pt,oneside]{amsart}
 \usepackage{amssymb}
 \usepackage[T1]{fontenc}
 \usepackage[utf8]{inputenc}
 \begin{document}
 Let us consider a spherical symmetric metric in curvature coordinates:
 \begin{equation} 
 \label{metric}
 ds^2=-e^\lambda dr^2-r^2(d\theta^2+\sin^2\theta d\phi^2)+e^\nu dt^2
 \end{equation}
 \end{document}​

The output I get is: enter image description here

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1 Answer

up vote 17 down vote accepted

Add the reqno document class option to your current file:

\documentclass[12pt,oneside,reqno]{amsart}

enter image description here

This will override the default left equation numbering scheme of the amsart document class. The following, taken from the AMS document class documentation provides some background (p 7):

Equation numbering on the left or right

The option leqno - equation numbers on the left - is the default in AMS styles. Therefore we provide also a reqno option.

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leqno and reqno are options of all document classes. I think your answer is too localized to amsart. –  Marco Daniel Oct 26 '11 at 11:31
1  
@MarcoDaniel: I don't read the answer as implying that the leqno applies only to the amsart package; the answer was merely taking the OP's specific example and showed how to add the required option. –  Mico Oct 26 '11 at 12:04
1  
@Mico: The answer is correct. My sentence based on the part default left equation numbering scheme of the amsart –  Marco Daniel Oct 26 '11 at 12:34
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