How to organize, add and multiply matrices - Bill Shillito
View full lesson: http://ed.ted.com/lessons/how-to-organize-add-and-multiply-matrices-bill-shillito When you're working on a problem with lots of numbers, as in economics, cryptography or...
========== Translator: Andrea McDonough
Reviewer: Bedirhan Cinar By now, I'm sure you know that in just about anything you do in life, you need numbers. In particular, though, some fields don't just need a few numbers, they need lots of them. How do you keep track of all those numbers? Well, mathematicians dating back as early as ancient China came up with a way to represent arrays of many numbers at once. Nowadays we call such an array a "matrix," and many of them hanging out together, "matrices". Matrices are everywhere. They are all around us, even now in this very room. Sorry, let's get back on track. Matrices really are everywhere, though. They are used in business, economics, cryptography, physics, electronics, and com...