| The_QSAR_and_Modelling_Society Meetings, members, news, positions, resources,computer-aided drug design. |
| Royal_Australian_Chemical_Institute,_WA_Branch The RACI is both the Australian qualifying body for professional chemists and a learned society promoting the science and practice of chemistry in all its branches. |
| Serbian_Chemical_Society History, journal, free download of the articles from the journal, sections, and affiliates of this professional society. |
| Society_of_Chemical_Industry A multidisciplinary network connecting industry, research and consumer affairs at all levels. |
| Society_of_Cosmetic_Chemists The Society strives to increase and disseminate scientific information through meetings and publications. Promoting research in cosmetic science and industry. |
| Society_of_Cosmetic_Chemists_-_Southwest_Chapter_-_Dallas,_TX Striving to increase and disseminate scientific information through meetings, events, and by promoting research in cosmetic science and industry. |
| Swiss_Society_for_Thermal_Analysis_and_Calorimetry_(STK) Promotes research in thermal analysis and chemical thermodynamics for members from industry and universities by conferences, symposia and scientific exchange. STK is related to ICTAC and ESTAC. |
| TCNJ_Gamma_Sigma_Epsilon The Sigma Beta chapter of Gamma Sigma Epsilon at College of New Jersey recognizes outstanding students demonstrating exceptional ability in the field of chemistry. |
| World_Chlorine_Council Represents the global chlorine and chlorinated products industries, and was created to improve our understanding of the benefits of chlorine chemistry and to address related health, environmental and |
| Aliquot Sequences with initial term up to 10,000, by Christophe Clavier. |
| Aliquot_Sequences Juan L. Varona's work on aliquot sequences examines sequences with start values up to 10000, and traces them to large composite values. |
| Aliquot_Sequences Statistics by Wolfgang Creyaufmueller, including many tables and links to factoring sites and software. |
| Aliquot_Sequences Aliquot sequences arise in iterating the sum-of-divisors function s. Bosma has calculated tables up to start value 50,000 and 80 digits. |
| Aliquot_Sequences Results and software from Paul Zimmermann, addressing the Catalan Conjecture and working on the difficult "Lehmer Five" sequences. |
| Amicable_Numbers Observations on amicable pairs and their distribution, including Harshad and Happy Amicable pairs. |
| Cubes_of_Perfection From Ivars Peterson's MathTrek column in MAA Online. Curious relationships satisfied by perfect numbers. |
| Multiply_Perfect_Numbers Up-to-date information on multiperfect numbers and searchable database maintained by Achim Flammenkamp. |
| Odd_Perfect_Numbers_-_Missing_Values Status of various factorisations that would extend the known area of non-existence of odd perfect numbers, by Kevin Hare. |
| On_a_Generalization_of_Perfect_Numbers J. L. Pe introduces perfect numbers relative to an arithmetical function f. Under this scheme, the usual perfect numbers are just one among many species of "f-perfect numbers". Several open problems a |
| Perfect_Number_-_from_MathWorld Definitions and references. |
| The_Perfect_Number_Journey A Mathematics Enrichment Workshop introducing perfect numbers. Lessons and exercises extend over several pages. Aimed at interested middle and high school students. |
| Perfect_Numbers A detailed history of the quest for perfect numbers, from Euclid to their present-day Mersenne discoveries. |
| Perfect_Numbers Harry J. Smith's pages of the mathematics behind perfect numbers, aliquot sequences and Mersenne numbers. Includes program listings and e-mail archives. |
| Tables_of_Aliquot_Cycles Data for various kinds up to 10^12, including unitary, infinitary, exponential, augmented and reduced varieties. |
| Ancient_Pi__Knowers_of_the_Universe The concept of pi refers to the constant ratio of the diameter:circumference of any circle; irrespective of the number of degrees contained within that circle. An article in the "Science in Ancient A |
| Ask_Dr__Math_-_Pi Dr Math answers over 60 questions submitted by people about pi including questions on the Bible's relationship to it and its relationship to trigonometry. |
| Ask_Dr__Math__About_Pi Explains what the constant is and a brief history. Includes resource links. |
| Buffon\'s_Needle An analysis of its relation to Pi and a simulation by George Reese. |
| Calculating_Pi An open source endeavor for the calculation of this constant. Describes the project, the implemented algorithms for calculatinon and software downloads. |
| A_Common_Book_of_Pi Includes a brief history, a page with different formulas and a list of references. |
| The_Constant_Pi History, formulae, algorithms, programs, records of computation, and references. |
| Dale\'s_Pi_Page Includes history of Pi, songs and jokes, poems, news and the first 1,000,000 digits. |
| Earth_Mysteries___Notes_on_Pi An introduction to the number Pi and its history. |
| Elias\'_Pi_Page Includes Pi in the Binary number system, Pi as a sound file and Pi shown in different images. |
| Fun_With_Pi A Topica email list. Archives readable by anyone. |
| Harry_Smith\'s_Brief_History_of_Pi_Calculations Brief history of Pi calculations from the ancient times to present day. |
| History_and_Philosophy_of_Pi Probably no symbol of infinity in mathematics has evoked as much mystery, romanticism, misconception and human interest as the number and Greek letter of Pi. Interesting facts and trivia about Pi. |
| How_Pi? Extracting the digits of pi from the SlOka |
| How_Stuff_Works__Pi Animated graphic helps to explain Pi and the different ways of calculating Pi, with some related links. |
| Indiana_Pi_Bill Bill proposing new value of pi. |
