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In mathematics, matrix calculus is a specialized notation for doing multivariable calculus, especially over spaces of matrices.It collects the various partial derivatives of a single function with respect to many variables, and/or of a multivariate function with respect to a single variable, into vectors and matrices that can be treated as single entities.
Matrix population models are a specific type of population model that uses matrix algebra.Population models are used in population ecology to model the dynamics of wildlife or human populations.
UPGMA (unweighted pair group method with arithmetic mean) is a simple agglomerative (bottom-up) hierarchical clustering method. It also has a weighted variant, WPGMA, and they are generally attributed to Sokal and Michener.
At the Battle of Bạch Đằng River in 938 near Hạ Long Bay in northern Vietnam, the military force of the Viet-ruled domain of Tĩnh Hải quân, led by Ngô Quyền, a Viet lord, defeated the invading forces of the Chinese state of Southern Han and put an end to the Third Era of Northern Domination (Chinese ruled Vietnam). [3]
Dao is a two-player abstract strategy board game, which won the Mensa Select award in 2001. It was invented by Ben VanBuskirk of Point Roberts, Washington , and Jeff Pickering of Monument, Oregon . It comprises a 4x4 playing board with four playing pieces for each player.