Numberphile - Sporting this T-Shirt today. FUN FACT: Ron Graham himself occasionally wears one!!! http://store.dftba.com/products/grahams-number- shirt | Facebook
![Numberphile on Twitter: "Three Circles t-shirt. https://t.co/i9yiL2iNL2 Video: https://t.co/JMeBngOdHu https://t.co/bx4wOk3FzW" / Twitter Numberphile on Twitter: "Three Circles t-shirt. https://t.co/i9yiL2iNL2 Video: https://t.co/JMeBngOdHu https://t.co/bx4wOk3FzW" / Twitter](https://pbs.twimg.com/media/Eo30HEyXUAIm3-t.jpg)
Numberphile on Twitter: "Three Circles t-shirt. https://t.co/i9yiL2iNL2 Video: https://t.co/JMeBngOdHu https://t.co/bx4wOk3FzW" / Twitter
![تويتر \ Numberphile على تويتر: "Get a Parker Square T-Shirt - because sometimes near enough is good enough… https://t.co/ce7xSyeJsg" تويتر \ Numberphile على تويتر: "Get a Parker Square T-Shirt - because sometimes near enough is good enough… https://t.co/ce7xSyeJsg"](https://pbs.twimg.com/media/CmjJReBWIAATXUv.jpg)