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Famous Art Science Quotes Poster T-Shirt Gift Shop > Physics: Quantum Theory, Relativity, Cosmology > Mathematics Physics: Paul Dirac Quantum Theory
"Sensible mathematics involves neglecting a quantity when it turns out to be small - not neglecting it just because it is infinitely great and you do not want it!" (Paul Dirac on Feynman's Quantum Electrodynamics QED and Renormalisation)
ABOUT CAFEPRESS: Cafepress are a print on demand online shop with nearly 3 million members (shopkeepers who create their own shops & products) and a total of 20 million products! The website is in the top 1,000 websites on the internet and gets around one million visitors each day. Because products are print on demand they are more expensive than mass produced goods, however, you have the advantage of purchasing unique custom made products that are not found anywhere else (this is particularly true for our philosophy shop). Cafepress ships products world wide (we live in Australia and have bought numerous items without any problems) and they have a thirty day full refund so it is a safe place to purchase some pretty cool gifts / presents (for yourself or others!).
CUSTOMER SERVICE: For help with: Cafepress Sales - Where's My Stuff - Track your Recent Orders - View or Change your Order - Shipping and Returns - Shipping Rates - Make a Return or Exchange - Questions and Order by Phone 1-877-809-1659 - Satisfaction Guaranteed.
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and welcome to the Philosophy Shop.
