Using Lipschitz continuity on open intervals

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SUMMARY

The discussion centers on the uniform continuity of the function f(x) = x^3 on the interval [-1, 2). It is established that Lipschitz continuity can be applied since the function has a bounded derivative on this interval, confirming that f is uniformly continuous despite the interval being open. The concern regarding the closed nature of the interval is addressed, emphasizing that it does not affect the application of Lipschitz continuity in this case.

PREREQUISITES
  • Understanding of Lipschitz continuity
  • Knowledge of uniform continuity
  • Familiarity with derivatives and their boundedness
  • Basic concepts of real analysis
NEXT STEPS
  • Study the definition and properties of Lipschitz continuity
  • Explore the implications of uniform continuity on open and closed intervals
  • Review examples of functions with bounded derivatives
  • Investigate the relationship between continuity and differentiability
USEFUL FOR

Mathematics students, particularly those studying real analysis, educators teaching calculus concepts, and anyone interested in the properties of continuous functions.

Calabi_Yau
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Homework Statement



Prove whether f(x) = x^3 is uniformly continuous on [-1,2)

Homework Equations





The Attempt at a Solution


I used Lipschitz continuity. f has a bounded derivative on that interval, thus it implies f is uniformly continuous on that interval.

But as it is not a closed interval, I am not sure I can use that approach. Any insight would be appreciated. Thanks.
 
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Calabi_Yau said:

Homework Statement



Prove whether f(x) = x^3 is uniformly continuous on [-1,2)

Homework Equations





The Attempt at a Solution


I used Lipschitz continuity. f has a bounded derivative on that interval, thus it implies f is uniformly continuous on that interval.

But as it is not a closed interval, I am not sure I can use that approach. Any insight would be appreciated. Thanks.

Maybe you should look at the definition of uniform continuity. I'm not sure why you are concerned about whether the interval is closed or not.
 

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