Errors and residualsIn statistics and optimization, errors and residuals are two closely related and easily confused measures of the deviation of an observed value of an element of a statistical sample from its "true value" (not necessarily observable). The error of an observation is the deviation of the observed value from the true value of a quantity of interest (for example, a population mean). The residual is the difference between the observed value and the estimated value of the quantity of interest (for example, a sample mean).
Computer performanceIn computing, computer performance is the amount of useful work accomplished by a computer system. Outside of specific contexts, computer performance is estimated in terms of accuracy, efficiency and speed of executing computer program instructions. When it comes to high computer performance, one or more of the following factors might be involved: Short response time for a given piece of work. High throughput (rate of processing work). Low utilization of computing resource(s). Fast (or highly compact) data compression and decompression.
Post-conceptual artPost-conceptual, postconceptual, post-conceptualism or postconceptualism is an art theory that builds upon the legacy of conceptual art in contemporary art, where the concept(s) or idea(s) involved in the work takes some precedence over traditional aesthetic and material concerns. The term first came into art school parlance through the influence of John Baldessari at the California Institute of the Arts in the early 1970s.
Real estate developmentReal estate development, or property development, is a business process, encompassing activities that range from the renovation and re-lease of existing buildings to the purchase of raw land and the sale of developed land or parcels to others. Real estate developers are the people and companies who coordinate all of these activities, converting ideas from paper to real property. Real estate development is different from construction or housebuilding, although many developers also manage the construction process or engage in housebuilding.
Epigraph (mathematics)In mathematics, the epigraph or supergraph of a function valued in the extended real numbers is the set, denoted by of all points in the Cartesian product lying on or above its graph. The strict epigraph is the set of points in lying strictly above its graph. Importantly, although both the graph and epigraph of consists of points in the epigraph consists of points in the subset which is not necessarily true of the graph of If the function takes as a value then will be a subset of its epigraph For example, if then the point will belong to but not to These two sets are nevertheless closely related because the graph can always be reconstructed from the epigraph, and vice versa.
