restricted correspondence
31Bohr model — In atomic physics, the Bohr model created by Niels Bohr depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus mdash;similar in structure to the solar system, but with… …
32Truth — For other uses, see Truth (disambiguation). Time Saving Truth from Falsehood and Envy, François Lemoyne, 1737 Truth has a variety of meanings, such as the state of being in accord with fact or reality …
33Surreal number — In mathematics, the surreal number system is an arithmetic continuum containing the real numbers as well as infinite and infinitesimal numbers, respectively larger or smaller in absolute value than any positive real number. The surreals share… …
34Sheaf (mathematics) — This article is about sheaves on topological spaces. For sheaves on a site see Grothendieck topology and Topos. In mathematics, a sheaf is a tool for systematically tracking locally defined data attached to the open sets of a topological space.… …
35Young tableau — In mathematics, a Young tableau (pl.: tableaux ) is a combinatorial object useful in representation theory. It provides a convenient way to describe the group representations of the symmetric and general linear groups and to study their… …
36English language — English Pronunciation /ˈ …
37Canadian Power and Sail Squadrons — (CPS) is a nationwide Canadian organization of recreational boating enthusiasts which offers boating safety courses. Its two most popular courses are BoatPro (also offered under the title Boating Handbook), which entails three or four hours of… …
38Philosophiæ Naturalis Principia Mathematica —   Title page of Principia , first edition (1687) Original title …
39American Revolution — The American Revolution refers to the political upheaval during the last half of the 18th century in which the Thirteen Colonies of North America overthrew the governance of the British Empire and collectively became the nation of the United… …
40T-V distinction — In sociolinguistics, a T V distinction describes the situation wherein a language has second person pronouns that distinguish varying levels of politeness, social distance, courtesy, familiarity, or insult toward the addressee. History and… …
