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How to type "Erdos"? In paricular, the "O" . Thanks ahead. enter image description here

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marked as duplicate by Qrrbrbirlbel, Jake, Stefan Kottwitz Mar 20 '13 at 8:18

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Thanks. Put it where? – John Mar 20 '13 at 7:42
3  
The double acute accent can also be produced with \H{} for non-unicode input, so Erd\H{o}s – benwilfut Mar 20 '13 at 7:43
    
Thanks, benwifut. It is useful. – John Mar 20 '13 at 7:48
up vote 11 down vote accepted

Using Unicode characters and LaTeX accents:

\documentclass[varwidth]{standalone}
\usepackage[utf8]{inputenc} 
\usepackage[T1]{fontenc}

\begin{document}
    Paul Erdős\\
    Paul Erd\H{o}s
\end{document}

Result

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