Hao Chen

What are Keybase teams?  A Keybase team is a group of people who can communicate with end-to-end cryptography. This means the team's chats and files cannot be read by anyone outside the team, not even someone...


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An animated introduction to the Fourier Transform. Help fund future projects: https://www.patreon.com/3blue1brown


But what is the Fourier Transform?  A visual introduction.


Signals and Systems was developed in 1987 as a distance-education course for engineers.  An introduction to analog and digital signal processing, including discrete- and continuous-time signals, linear time-invariant systems, feedback, and data processing.


But what is the Fourier Transform? A visual introduction.

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