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Apply and Heads option


Hello mathgroup, 
---------

Apply has the Heads option.  
Can somebody give an example where 
Apply[f, expr, Heads->True]   gives a different result than 
Apply[f, expr, Heads->False].

OR where 

Apply[f, expr, levelspec, Heads->True]   gives a different result than 
Apply[f, expr, levelspec, Heads->False].

----------
Thanks,
   Ted Ersek



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