187862
Specifically , we consider functions f on \ mathbb ^ n and their associated maximal function s M ( f ) defined as where B_r is a ball in \ mathbb ^ n with radius r and centre x. We wish to characterise the functions \ omega \ colon \ mathbb ^ n \ to [ 0 , \ infty ) for which we have a bound where C depends only on p \ in [ 1 , \ infty ) and \ omega .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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