Happy Shameless Plug Day-After!

By interesting coincidence, [Tee]Spring is sponsoring a site-wide 20%-off sale until Wednesday, 11 July. Use promo code SUMMERVIBES20 at checkout. (They take the discount out of their cut of each purchase. Nifty!)

https://teespring.com/coexist-tau-pi
https://teespring.com/kangleroo

Thanks for your support! #ShamelessPlugDay #TauDay

Happy Shameless Plug Day! A reminder of my tau-shirt designs available from [Tee]Spring: http://teespring.com/coexist-tau-pi and http://teespring.com/tau-and-pi #TauDay #ShamelessPlugDay #MathyDay

Happy #ShamelessPlugDay!

With #PiDay fast approaching, I thought I'd mention some relevant t-shirt designs: the Approximately Pi trigonograph and the (Fractions of) Powers of Pi Involute Pinwheel; as well as Tau and Pi, and COEXIST, for people who want something also suitable for #TauDay.

https://teespring.com/approx-pi
https://teespring.com/pi-power-pinwheel
https://teespring.com/tau-and-pi
https://teespring.com/coexist-tau-pi