The PF Library has been a success by offering dozens of material to curious visitors! We thank everyone who has participated. Over the next several months PF will be planning to migrate to a new software platform and thus the Library will no longer be compatible. We plan on moving all PF Library content to the Physics and Math FAQs for future reference. Physics Library Items https://www.physicsforums.com/forums/physics-faq.209/ [Broken] Math Library Items https://www.physicsforums.com/forums/math-faq.207/ [Broken] * Nearly all the entries lost the creator information. So if you want recognition please let me know which entries you wrote. Thanks!!