countable family
51business — busi‧ness [ˈbɪzns] noun COMMERCE 1. [uncountable] the production, buying, and selling of goods or services for profit: • Students on the course learn about all aspects of business. • We are in business to create profit. • The company says it… …
52Banach–Tarski paradox — The Banach–Tarski paradox is a theorem in set theoretic geometry which states that a solid ball in 3 dimensional space can be split into several non overlapping pieces, which can then be put back together in a different way to yield two identical …
53Direct integral — In mathematics and functional analysis a direct integral is a generalization of the concept of direct sum. The theory is most developed for direct integrals of Hilbert spaces and direct integrals of von Neumann algebras. The concept was… …
54Compact operator on Hilbert space — In functional analysis, compact operators on Hilbert spaces are a direct extension of matrices: in the Hilbert spaces, they are precisely the closure of finite rank operators in the uniform operator topology. As such, results from matrix theory… …
55part — I UK [pɑː(r)t] / US [pɑrt] noun Word forms part : singular part plural parts *** 1) [countable] one of the pieces, sections, aspects etc that something consists of It was a pretty boring class, but the part about using spreadsheets was quite… …
56Supplemental Needs Trust — A Supplemental Needs Trusts is a US specific term for a type of special needs trust (an internationally recognised term). Supplemental needs trusts are compliant with provisions of United States (federal and state) law and are designed to provide …
57Non-measurable set — This page gives a general overview of the concept of non measurable sets. For a precise definition of measure, see Measure (mathematics). For various constructions of non measurable sets, see Vitali set, Hausdorff paradox, and Banach–Tarski… …
58cost — The opposite of revenue. An expense that reflects the price of purchasing goods, services and financial instruments. A cash cost means that cash is given up today to the purchase. Also, the purchase price of an investment, which is compared to… …
59line — 1 noun LONG THIN MARK 1 (C) a long thin, usually continuous mark on a surface: A wiggly line showed where the river was. | straight line: Can you draw a straight line? | dotted line (=a broken straight line drawn or printed on paper): Sign your… …
60Base (topology) — In mathematics, a base (or basis) B for a topological space X with topology T is a collection of open sets in T such that every open set in T can be written as a union of elements of B. We say that the base generates the topology T. Bases are… …
