Do Nonempty Perfect Sets in R Exist Without Rational Numbers?

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SUMMARY

Nonempty perfect sets in the real numbers (R) that contain no rational numbers do exist. A perfect set is defined as a closed set where every point is a limit point of the set. The Cantor set is a prime example of such a set, as it is uncountable, closed, and contains no rational numbers. This conclusion is supported by established mathematical principles and the properties of the Cantor set.

PREREQUISITES
  • Understanding of real analysis concepts, specifically perfect sets.
  • Familiarity with the properties of closed sets in topology.
  • Knowledge of limit points and their significance in set theory.
  • Basic comprehension of the Cantor set and its construction.
NEXT STEPS
  • Study the properties of the Cantor set in detail.
  • Explore the implications of closed sets in topology.
  • Research limit points and their role in defining perfect sets.
  • Examine examples of other perfect sets in R that contain no rational numbers.
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Mathematicians, students of real analysis, and anyone interested in advanced set theory concepts will benefit from this discussion.

AbelAkil
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Is there any nonempty perfect set in R which contains no rational number?
I cannot figure it out...:frown:
I appreciate your solutions!

PS: A set E is perfect iff E is closed and every point of E is a limit point of E
 
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