Introduction to Matrices | Boundless Algebra - Deepstash
Matrices simplified

Imagine yourself walking into a pizzeria to buy a delicious pizza.

A pizzeria sells many kinds of pizzas.

and serves for each kind three different sizes (small-medium-large)

To remember all these data , the owner arranged kinds , sizes and prices in a respective way in a table (or The Menu) .

In this case, the menu is our matrix.

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What is a Matrix ?

In mathematics, a matrix (plural matrices) is a rectangular array of numbers, symbols, or expressions, arranged in rows and columns.

  • The size of a matrix is defined by the number of rows and columns that it contains. A matrix with m rows and n columns is called an m × n matrix.
  • while m and n are called its dimensions .

The dimensions of the following matrix are 3x3 because there are three rows and three columns.

N.B:

  • i describes the number of the row
  • j describes the number of the column

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