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          Boolean Operators
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          Metacharacters
          The bad news: In general, punctation and other non-alphanumeric characters are not indexed and cannot currently be searched for. Currently some interesting characters like (,), and = are not searchable. Regrettably, this means that one cannot search for SU(3) or c=1 at this time (but searching for 'c' AND '1' will give hits on 'c = 1').
          The good news: The characters ^,_,{,},+, and - are indexed. For example, searching for K^+ or nu_e will work - be aware that authors are not always consistent in how super- and subscripts are presented.
          Non-indexed characters are stripped out from the search query.
          Stemming
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          Hyphens are removed from most phrases (domain-wall becomes domain wall). This is because the use of hyphens is often inconsistent. Hyphens are not removed from archive and category names, nor are they removed when it would result in a single letter being left over: c-theorem remains hypenated and is searchable. Try searching for domain AND wall or for "domain wall". The latter is more accurate, but can be much slower than the former
          Example author searches
          T Bhattacharya
          T Bhattacharya AND NOT (S R Sharpe OR Rajan Gupta)
          'Bhatta*' is OK, but 'T Bhatta*' will not work because initials and '*' cannot be used together
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