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matrix

a rectangular array of elements (or entries) set out by rows and columns

element

each piece of information in a matrix

scalar

A term used in matrix multiplication to describe a real number as opposed to a matrix

Scalar Product

The product of a scalar and a matrix

matrix equation

An equation with matrices

matrix product

The result when two matrices are multiplied

columnar matrix

A matrix with only one column

fractal

A geometric shape that can be split into parts, each of which is a reduced-size copy of the whole

determinant

ad-bc; must be nonzero for an invertible matrix

Cramer's rule

A formula for solving a system of two linear equations using matrices

coefficient matrix

A matrix used to solve a system of linear equations with Cramer's rule, in which the elements of the matrices are the coefficients of the variables

identity matrix

diagonal matrix with ones in the leading diagonal and zeros in the other positions.

multiplicative inverse

reciprocal of a number

inverse matrix

The multiplicative inverse of a square matrix is called its inverse matrix.

linear programming

A way to solve some real-life problems, involves maximizing or minimizing some function (such as profit or cost), where the variables defining the function are subject to some linear inequalities

constraints

Restrictions on one ore more variables in a problem

objective function

In linear programming, the function to optimize—that is, to maximize or minimize

optimize

To find the best solution to a linear programming problem. For example, to make the most profit or to find the solution with the least cost

feasible region

The graph of possible solutions, or choices, in a linear programming problem