A square matrix is a matrix with the same number of rows and columns. An n-by-n matrix is known as a square matrix of order n. Any two square matrices of the same order can be added and multiplied. The entries aii form the main diagonal of a square matrix.
Encyclopedia of Africa. Author(s): The Berlin Conference of 1884â1885 marked the climax of the European competition for territory in Africa, a process commonly known as the Scramble for Africa.
While at the Manchester congress, Nkrumah founded the West African National Secretariat to promote a so-called United States of Africa. Pan-Africanism as an intergovernmental movement was launched in 1958 with the First Conference of Independent African States in Accra, Ghana. Ghana and Liberia were the only sub-Saharan countries represented; the remainder were Arab and Muslim.