Matrix norm

A matrix is like a big square made up of numbers. Just like a ruler can measure the length of something, a matrix norm measures the size of a matrix.

There are different ways to measure the size of a matrix, but some of the most common ways are by looking at the largest number in the matrix, or the sum of all the numbers in the matrix.

Matrix norms are important because they help us compare different matrices and understand how they behave in different situations. Just like how we can use a ruler to see which object is longer, we can use matrix norms to see which matrix is "bigger" or "smaller".

So, matrix norm is a way to measure the size of a matrix and it helps us understand how different matrices behave in different situations.