Need a Functional Analysis book

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Discussion Overview

The discussion revolves around recommendations for books on functional analysis and measure/integration theory. Participants are seeking resources that would help them prepare for stochastic calculus, with a focus on foundational knowledge in these areas.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant expresses a need for a measure/integration theory book that covers the basics, having already studied calculus, complex analysis, ODEs, and some PDEs.
  • Another participant suggests Kreyszig's book as a good starting point, noting its accessibility and lack of prerequisite knowledge in topology.
  • A different participant echoes the recommendation for Kreyszig, while also mentioning that they believe a combination of functional analysis and measure theory might be necessary.
  • Another suggestion includes Royden or Folland, with a note that Folland is considered more advanced and technical.

Areas of Agreement / Disagreement

Participants generally agree on the need for foundational texts in measure/integration theory and functional analysis, but there are multiple competing views regarding which specific books are most suitable.

Contextual Notes

Some participants highlight the importance of prior knowledge in topology for certain texts, indicating that the choice of book may depend on the reader's background and familiarity with related topics.

Tosh5457
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I need a measure/integration theory book that covers the basics. I had already calculus, complex analysis, ODEs and topics of PDEs/Sturm-Liouville problem.

More specifically I need to learn functional analysis to be prepared for stochastic calculus. Any suggestions? Thank you.
 
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I haven't read it myself, but everyone says that Kreyszig is the easiest one. In particular, it doesn't require you to know topology before you start. Some other books (in particular Conway) are impossible to read if you're not already very good at topology and pretty good at measure/integration theory.
 
Fredrik said:
I haven't read it myself, but everyone says that Kreyszig is the easiest one. In particular, it doesn't require you to know topology before you start. Some other books (in particular Conway) are impossible to read if you're not already very good at topology and pretty good at measure/integration theory.

Hum looking at the contents of Kreyszig's book, actually I think what I need is measure/integration theory, or a combination of Functional analysis and measure theory.
 
Sounds like you need something along the lines of Royden or Folland (Folland is more advanced and technical).
 

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