Greetings,

I'm needing to translate a document produced by someone else, that
contains the following definition:

\def\oos{${\cal O}(\alpha \alpha_s^2)$}

and then uses \oos\ repeatedly.  This gives an appearance of working
in the original printed version, but brings complaints from
latex2html (although in recent versions it seems to be producing
acceptable results).

Presumably this author is relying on getting their bad syntax fixed
up, but not being a latex wizard, I'm not sure what would be correct. 
Please can someone advise me? 

When run with e.g latex2html 98.1p7, for example, I get these errors
reported:

*** no brace for \cal , before:
 O
*** using "" as the argument instead; is this correct?  ***

and it's the same with 98.2beta6.

thanks

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