Search results
Results From The WOW.Com Content Network
Of the additional 1.9 billion people projected between 2020 and 2050, 1.2 billion will be added in Africa, 0.7 billion in Asia and zero in the rest of the world. Africa's share of global population is projected to grow from 17% in 2020 to 25% in 2050 and 38% by 2100, while the share of Asia will fall from 60% in 2020 to 55% in 2050 and 45% in 2100.
In mathematics and statistics, the arithmetic mean (/ ˌ æ r ɪ θ ˈ m ɛ t ɪ k / arr-ith-MET-ik), arithmetic average, or just the mean or average (when the context is clear) is the sum of a collection of numbers divided by the count of numbers in the collection. [1]
The length of the chord AB is 2(a cos φ) sin λ / 2 . This chord subtends an angle at the centre equal to 2arcsin(cos φ sin λ / 2 ) and the great circle distance between A and B is 2a arcsin(cos φ sin λ / 2 ).) In the extreme case where the longitudinal separation is 180°, the distance along the parallel is one half ...
Arithmetic is the fundamental branch of mathematics that studies numbers and their operations. In particular, it deals with numerical calculations using the arithmetic operations of addition, subtraction, multiplication, and division. [1]
Map algebra is an algebra for manipulating geographic data, primarily fields.Developed by Dr. Dana Tomlin and others in the late 1970s, it is a set of primitive operations in a geographic information system (GIS) which allows one or more raster layers ("maps") of similar dimensions to produce a new raster layer (map) using mathematical or other operations such as addition, subtraction etc.
Lambert's projection is the basis for the cylindrical equal-area projection family. Lambert chose the equator as the parallel of no distortion. [2] By multiplying the projection's height by some factor and dividing the width by the same factor, the regions of no distortion can be moved to any desired pair of parallels north and south of the ...
When k is a composite number, there will exist isomorphisms from a binary field GF(2 k) to an extension field of one of its subfields, that is, GF((2 m) n) where k = m n. Utilizing one of these isomorphisms can simplify the mathematical considerations as the degree of the extension is smaller with the trade off that the elements are now ...
In number theory, an arithmetic, arithmetical, or number-theoretic function [1] [2] is generally any function whose domain is the set of positive integers and whose range is a subset of the complex numbers.