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Pre-algebra is a common name for a course taught in middle school mathematics in the United States, usually taught in the 6th, 7th, 8th, or 9th grade. [1] The main objective of it is to prepare students for the study of algebra. Usually, Algebra I is taught in the 8th or 9th grade. [2]
Open Book Publishers (OBP) is an open access academic book publisher based in the United Kingdom. It is a non-profit social enterprise and community interest company (CIC) that promotes open access for academic monographs , edited collections, critical editions and textbooks in the Humanities , Social Sciences , Mathematics and Science .
Precalculus prepares students for calculus somewhat differently from the way that pre-algebra prepares students for algebra. While pre-algebra often has extensive coverage of basic algebraic concepts, precalculus courses might see only small amounts of calculus concepts, if at all, and often involves covering algebraic topics that might not have been given attention in earlier algebra courses.
In mathematics, a pre-Lie algebra is an algebraic structure on a vector space that describes some properties of objects such as rooted trees and vector fields on affine space. The notion of pre-Lie algebra has been introduced by Murray Gerstenhaber in his work on deformations of algebras.
Their emergence is highly influential and one of the major contributions of quantitative geography to the broader branch of technical geography. [21] The discipline of geography is unlikely to settle the matter anytime soon. Several laws have been proposed, and Tobler's first law of geography is the most widely accepted.
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OB star, in astronomy, a hot, massive star of spectral types O or B; Ob, a class of objects in category theory; Object Manager (Windows), a Windows NT subsystem Obstetrics, a medical specialty dealing with childbirth, often used in "obstetrics and gynaecology" (abbreviated OB/GYN)
Around 1715, Herman Moll produced a map showing the northern part of the Ob River and the Irtysh River, a major tributary of the Ob, as components of a series of partly-joined waterways taking the boundary between Europe and Asia from the Turkish Straits, and the Don River all the way to the Arctic Ocean. In 1721, he produced a more up to date ...