141491
A modulus of convergence is essentially a function that , given ε , returns a corresponding value of N. Definition Suppose that ( xi ) is a convergent sequence of real numbers with limit x. There are two ways of defining a modulus of convergence as a function from natural numbers to natural numbers : The latter definition is often employed in constructive settings , where the limit x may actually be identified with the convergent sequence .
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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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