# denote

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**Number sign**— Not to be confused with the Chinese character 井, or the Sharp sign ♯. # Number sign …82

**Busy beaver**— In computability theory, a busy beaver (from the colloquial expression for an industrious person) is a Turing machine that attains the maximum operational busyness (such as measured by the number of steps performed, or the number of nonblank… …83

**Tilde**— For the baseball player known as the Big Tilde, see Magglio Ordóñez.  ◌̃ Tilde Punctuation …84

**Laws of Form**— (hereinafter LoF ) is a book by G. Spencer Brown, published in 1969, that straddles the boundary between mathematics and of philosophy. LoF describes three distinct logical systems: * The primary arithmetic (described in Chapter 4), whose models… …85

**Kuruc**— The kuruc (Hungarian: kuruczok/kurucok [sg. kuruc(z) ] , Slovak: kuruci [sg. kuruc ] ) was a term used to denote the armed anti Habsburg Hungarian rebels in Royal Hungary between 1671 and 1711.The kuruc army were mostly composed of Magyars, the… …86

**Set notation**— Sets are fundamental objects in mathematics. Intuitively, a set is merely a collection of elements or members . There are various conventions for textually denoting sets. In any particular situation, an author typically chooses from among these… …87

**Armstrong's axioms**— are a set of axioms (or, more precisely, inference rules) used to infer all the functional dependencies on a relational database. They were developed by William W. Armstrong on his paper Dependency Structures of Data Base Relationships published… …88

**Geresh**— For the Torah cantillation mark of the same name, see Geresh (trope). Geresh diacritic, punctuation mark ׳ וכו׳ cantillation mark …89

**Schuette–Nesbitt formula**— In probability theory, the Schuette–Nesbitt formula is a generalization of the probabilistic version of the inclusion exclusion principle. It is named after Donald R. Schuette and Cecil J. Nesbitt. The Schuette–Nesbitt formula has practical… …90

**solids, mechanics of**— ▪ physics Introduction science concerned with the stressing (stress), deformation (deformation and flow), and failure of solid materials and structures. What, then, is a solid? Any material, fluid or solid, can support normal forces.… …