Post your favorite real analysis problem

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Discussion Overview

The discussion revolves around participants sharing their favorite real analysis problems, exploring the scope of real analysis, and clarifying what constitutes real analysis in contrast to other mathematical fields like complex analysis. The conversation includes references to resources and differing perspectives on the prerequisites and focus areas of real analysis.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant invites others to share their favorite real analysis problems without providing solutions, seeking engaging problems from various sources.
  • Another participant shares links to Cambridge past exam papers and example sheets, suggesting these as resources for real analysis problems.
  • There is a question about the definition of real analysis, with some participants distinguishing between measures and integrals versus the exclusion of complex analysis.
  • One participant argues that real analysis is not a strict prerequisite for complex analysis, emphasizing that real analysis focuses on measure theory and functions with complex properties, while complex analysis deals with smoother functions.
  • A later reply suggests that real analysis should be viewed as rigorous single-variable calculus with proofs, indicating a foundational perspective.

Areas of Agreement / Disagreement

Participants express differing views on the definition and scope of real analysis, with no consensus reached on its relationship to complex analysis or its essential prerequisites.

Contextual Notes

Some assumptions about the definitions of real analysis and its components remain unresolved, as do the implications of its relationship to other mathematical fields.

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TL;DR
I'm looking for good real analysis problems to hone my math skills. I didn't take a proper real analysis course during my BA, and skipped ahead to complex analysis and topology. And I felt that I didn't learn that much because my real analysis knowledge was shaky. And I figure it's time to catch up on what I'm lacking.
I figure one can dig around for plenty of quality problems online, but I'm hoping to skip right to the good stuff by you posting your favorite real analysis problems from college, internet, textbook, dream, imagination, etc. It would be so helpful to get some comments this time, and please don't post the solutions, I'm just looking for something to solve. Thanks.
 
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What do you mean by real analysis? Measures and integrals, or do you mean not complex?
 
martinbn said:
What do you mean by real analysis? Measures and integrals, or do you mean not complex?
not complex, though I suppose there's no reason to exclude complex.
 
I don't think that real analysis is an essential prerequisite for complex analysis other than what you would know from a good calculus class. Real analysis concentrates on measure theory and sets/functions with bizarre properties, whereas complex analysis concentrates on functions with amazingly smooth behavior (EDIT: except around essential singularities).

(EDIT: On the other hand, I think that Real Analysis, measure theory, and Lebesgue integration is essential for any mathematician.)
I have always been a fan of Schaum's Outlines. They have a lot of solved problems and exercises. For their Real Analysis, I can only find an online PDF that requires some sort of payment.
 
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I think "real analysis", as a precursor to topology or complex analysis, means "single variable calculus, but done rigorously with proofs".
 
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