New post on my website! (sneak peak
)
•Fourier Transforms (1)
https://sites.uci.edu/inertialobserver/mathematics-for-physics-crash-course/ …pic.twitter.com/85DIzygdCJ
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Also you may put the parenthesis to include ak and bk into the sum 
For some reason people complain about this .. I don’t see the issue
Thanks - enjoy your stuff.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.