Lebesgue measure, prooving that a specific open set exists

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SUMMARY

This discussion focuses on proving the existence of a specific open set in the context of Lebesgue measure, particularly addressing cases where the measure of set E is infinite. The participant successfully solved the finite case but seeks guidance on handling infinite measures. A proposed solution involves analyzing intersections of intervals with E, utilizing sufficiently small epsilon values to sum and recover the original epsilon.

PREREQUISITES
  • Understanding of Lebesgue measure theory
  • Familiarity with open sets in topology
  • Knowledge of epsilon-delta arguments in analysis
  • Experience with set intersections and summation techniques
NEXT STEPS
  • Study Lebesgue measure properties in infinite contexts
  • Explore the concept of open sets in measure theory
  • Learn about epsilon-delta proofs in real analysis
  • Investigate techniques for summing infinite series in measure theory
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Mathematics students, particularly those studying real analysis and measure theory, as well as educators looking for examples of Lebesgue measure applications.

bobby2k
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Homework Statement



oppg.png


Homework Equations

The Attempt at a Solution


I have managed to solve it for the finite case, where the masure is less than infinity. But how do I solve it if the ,measure if the measure of E is infinite?
 
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bobby2k said:

Homework Statement



View attachment 79135

Homework Equations

The Attempt at a Solution


I have managed to solve it for the finite case, where the masure is less than infinity. But how do I solve it if the ,measure if the measure of E is infinite?

Solve it on intersections of intervals with E with small enough values of epsilon that you can sum them all and get the original epsilon.
 

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