Send a comment on this item to LII: Send a comment on this item to LII staff, who on weekdays will usually reply within 24 hours. Kenny Felder's Math and Physics Help Home Page Collection of papers that "explain various concepts in math and physics." Topics include partial fractions, a trigonometry review, tips for using Texas Instruments graphing calculators, general relativity, quantum mechanics, entropy, Bell's theorem, and related concepts. From two brothers with backgrounds in math, computer science, and physics. http://www4.ncsu.edu/unity/lockers/users/f/felder/public/kenny/home.html Asterisk * indicates required field. Your Name Your Email Address * We will not sell or provide your email address to anyone else. Comment * Enter the verification code as it is shown in the box below. This helps prevent automated submissions. *