equivalent keys
51Relational model — The relational model for database management is a database model based on first order predicate logic, first formulated and proposed in 1969 by Edgar Codd. [ Derivability, Redundancy, and Consistency of Relations Stored in Large Data Banks , E.F …
52Ontological paradox — An ontological paradox is a paradox of time travel that questions the existence and creation of information and objects that travel in time. It is very closely related to the predestination paradox and usually occurs at the same time. Because of… …
53Sharp (music) — For the use of the sharp sign in mathematics, see Musical isomorphism. ♯ redirects here. It is not to be confused with Number sign or well field system. The notes C sharp and C double sharp on the treble clef …
54Positive liberty — #time:j F Y| #time:#ifeq:#time:Y|einval 2000|#time:Y|einval 2001|j F Y|j F|einval Progressivism Liberalism sidebarPositive liberty refers to the opportunity and ability to act to fulfill one s own potential, as opposed to negative liberty , which …
55Cryptanalysis — Close up of the rotors in a Fialka cipher machine Cryptanalysis (from the Greek kryptós, hidden , and analýein, to loosen or to untie ) is the study of methods for obtaining the meaning of encrypted information, without access to the secret… …
56Radix sort — In computer science, radix sort is a sorting algorithm that sorts integers by processing individual digits. Because integers can represent strings of characters (e.g., names or dates) and specially formatted floating point numbers, radix sort is… …
57Apple IIe — Mac specs| ProDOS|RAM=64 KB (up to 1 MB+)|RAMtype=| Discontinued=November 1993The Apple IIe is the third model in the Apple II series of personal computers produced by Apple Computer. The e in the name stands for enhanced , referring to the fact… …
58Enharmonic — In modern music and notation, an enharmonic equivalent is a note (enharmonic tone), interval (enharmonic interval), or key signature which is equivalent to some other note, interval, or key signature, but spelled , or named, differently. Thus,… …
59Apple Keyboard — Current Apple Wireless Keyboard Developer Apple Inc. Release date 1983 to present Website …
60Index alphabétique maritime — Projet:Maritime/Index Projet maritime Bistro du port Participants Actualités   Agenda Outils À faire …
