# ill-defined

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**HTML**— For the use of HTML on Wikipedia, see Help:HTML in wikitext. HTML (HyperText Markup Language) Filename extension .html, .htm Internet media type text/html Type code TEXT …62

**Cauchy principal value**— In mathematics, the Cauchy principal value of certain improper integrals, named after Augustin Louis Cauchy, is defined as either* the finite number::lim {varepsilon ightarrow 0+} left [int a^{b varepsilon} f(x),dx+int {b+varepsilon}^c f(x),dx… …63

**Tropical Storm Olga (2007)**— Infobox Hurricane Name=Tropical Storm Olga Type=Tropical storm Year=2007 Basin=Atl Image location=Olgacolor.jpg Formed=December 11, 2007 Dissipated=December 13, 2007 1 min winds=50 Pressure=1003 Da Fatalities=40 direct Areas=Puerto Rico,… …64

**Time**— This article is about the measurement. For the magazine, see Time (magazine). For other uses, see Time (disambiguation). The flow of sand in an hourglass can be used to keep track of elapsed time. It also concretely represents the present as… …65

**1998 Pacific hurricane season**— Infobox hurricane season Basin=EPac Year=1998 Track=1998 Pacific hurricane season map.png First storm formed=June 11, 1998 Last storm dissipated=October 20, 1998 Strongest storm name=Howard Strongest storm winds=130 Strongest storm pressure=932… …66

**Customary law in South Africa**— South African customary law refers to that usually uncodified legal system developed and practiced by the indigenous communities of South Africa. Customary law has been defined as an established system of immemorial rules [...] evolved from the… …67

**Quantum field theory**— In quantum field theory (QFT) the forces between particles are mediated by other particles. For instance, the electromagnetic force between two electrons is caused by an exchange of photons. But quantum field theory applies to all fundamental… …68

**Mass–energy equivalence**— E=MC2 redirects here. For other uses, see E=MC2 (disambiguation). 4 meter tall sculpture of Einstein s 1905 E = mc2 formula at the 2006 Walk of Ideas, Berlin, Germany In physics, mass–energy equivalence is the concept that the …69

**Papilio arcturus**— Taxobox name = Blue Peacock status = image caption = Princeps arcturus regnum = Animalia phylum = Arthropoda classis = Insecta ordo = Lepidoptera familia = Papilionidae genus = Papilio species = P. arcturus binomial = Papilio arcturus binomial… …70

**Abisara neophron**— Taxobox name = Tailed Judy image width = 225px image caption = Tailed Judy ( Abisara neophron ) regnum = Animalia phylum = Arthropoda classis = Insecta ordo = Lepidoptera superfamilia = Papilionoidea familia = Riodinidae genus = Abisara species …71

**BRST quantization**— In theoretical physics, BRST quantization (where the BRST refers to Becchi, Rouet, Stora and Tyutin) is a relatively rigorous mathematical approach to quantizing a field theory with a gauge symmetry. Quantization rules in earlier QFT frameworks… …72

**Trace operator**— In mathematics, the concept of trace operator plays an important role in studying the existence and uniqueness of solutions to boundary value problems, that is, to partial differential equations with prescribed boundary conditions. The trace… …73

**Greece, history of**— ▪ Byzantine to modern Introduction history of the area from the Byzantine (Byzantine Empire) period, beginning about AD 300, to the present. For earlier periods, see Aegean civilizations; ancient Greek civilization; and Hellenistic Age.… …74

**Milecastle 9**— Coordinates: 54°59′27″N 1°43′20″W / 54.990701°N 1.722327°W / 54.990701; 1.722327 …75

**Model of Hierarchical Complexity**— The model of hierarchical complexity is a framework for scoring how complex a behavior is. It quantifies the order of hierarchical complexity of a task based on mathematical principles of how the information is organized and of information… …76

**Orbital magnetization**— Orbital magnetization, , refers to the magnetization induced by orbital motion of charged particles, usually electrons, in solids. The term orbital distinguishes it from the contribution of spin degrees of freedom, , to the total magnetization. A …77

**Puhua**— Not to be confused with Pu Hua. Puhua Zhenzhou Pǔhuà (鎮州普化) A modern depiction of the folkloric Puhua ringing his hand bell, by artist John Singer c. 2001. R …78

**Ockham’s world and future**— Arthur Gibson PHILOSOPHICAL BIOGRAPHY Ockham was born in about 1285, certainly before 1290, probably in the village of Ockham, Surrey, near London. If his epitaph is accurate, he died on 10 April 1347. Yet Conrad of Megenberg, when writing to… …79

**Subpoena duces tecum**— A subpoena duces tecum (or subpoena for production of evidence) is a court summons ordering a named party to appear before the court and produce documents or other tangible evidence for use at a hearing or trial. The summons is known by various… …80

**History of the Balkans**— The Balkans is an area of southeastern Europe situated at a major crossroads between mainland Europe and the Near East. The distinct identity and fragmentation of the Balkans owes much to its common and often violent history and to its very… …