there's a well defined difference

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• Well logging — Gamma ray logging Spontaneous potential logging Resistivity logging Density logging Sonic logging Caliper logging Mud logging LWD/MWD v · …   Wikipedia

• Boolean algebras canonically defined — Boolean algebras have been formally defined variously as a kind of lattice and as a kind of ring. This article presents them more neutrally but equally formally as simply the models of the equational theory of two values, and observes the… …   Wikipedia

• Symmetric difference — Venn diagram of The symmetric difference is the union without the intersection …   Wikipedia

• Depth in a well — In the oil and gas industry, depth in a well is the measurement, for any point in that well, of the distance between a reference point or elevation, and that point. It is the most common method of reference for locations in the well, and… …   Wikipedia

• Delta potential well — The Delta potential well is a common theoretical problem of quantum mechanics. It consists of a time independent Schrödinger equation for a particle in a potential well defined by a delta function in one dimension.DefinitionThe time independent… …   Wikipedia

• Goal difference — In sports such as ice hockey and football (soccer), goal difference (that is, goals scored minus goals conceded) is often the first tiebreaker used to rank teams which finish a league competition with an equal number of points.If a team s points… …   Wikipedia

• Contract for difference — In finance, a contract for difference (or CFD) is a contract between two parties, typically described as buyer and seller , stipulating that the buyer will pay to the seller the difference between the current value of an asset and its value at… …   Wikipedia

• Oil well control — is the management of the dangerous effects caused by unexpected high pressures upon surface equipment of oil or gas drilling rigs. Technically, oil well control involves preventing Formation fluid, usually referred to as kick, from entering into… …   Wikipedia

• Finite difference — A finite difference is a mathematical expression of the form f(x + b) − f(x + a). If a finite difference is divided by b − a, one gets a difference quotient. The approximation of derivatives by finite differences… …   Wikipedia

• place lands — Lands granted which were within certain limits on each side of the road, and which became instantly fixed by the adoption of the line of the road. There is a well defined difference between place lands and indemnity lands. See indemnity …   Black's law dictionary

• pottery — /pot euh ree/, n., pl. potteries. 1. ceramic ware, esp. earthenware and stoneware. 2. the art or business of a potter; ceramics. 3. a place where earthen pots or vessels are made. [1475 85; POTTER1 + Y3] * * * I One of the oldest and most… …   Universalium