Need a Functional Analysis book

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The discussion centers on finding a suitable textbook for measure and integration theory, particularly for someone with a background in calculus, complex analysis, ordinary differential equations, and partial differential equations. The need for a foundational understanding of functional analysis to prepare for stochastic calculus is emphasized. Kreyszig's book is recommended as an accessible option that does not require prior knowledge of topology, making it suitable for beginners. In contrast, Conway's text is noted as challenging for those lacking a strong grasp of topology and measure theory. Additionally, Royden and Folland are suggested as alternatives, with Folland being recognized as more advanced and technical. Overall, the focus is on selecting a resource that effectively bridges the gap to functional analysis and measure theory.
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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