Fourier Series and Transforms
Unknown
Detailed practitioner rec from r/math
More resources on Fourier Transforms
Harmonic Analysis Resources
Curated list from MathOverflow/Reddit
Fourier Analysis Notes
Terry Tao's notes on harmonic analysis
Pauls Online Math Notes - Fourier Series
Free comprehensive notes
Fourier Transform Introduction
Brilliant overview with harmonic analysis basics
mathworld.wolfram.com
MathWorld is Wolfram's comprehensive online mathematics encyclopedia, offering detailed, rigorously written articles on a wide range of math topics. Its Fourier Transform entries cover continuous and discrete transforms, key properties, transform pairs, formulas, examples, and related concepts and applications.
ocw.mit.edu
MIT OpenCourseWare (OCW) offers free, openly licensed course materials from a wide range of MIT classes, including lecture notes, assignments, exams, and videos. It’s a self-paced resource for learning topics like Fourier transforms and related subjects across engineering and mathematics.