College Math Games .com

So you like matrices? And you think linear transformations are cool? Alright then, let's mess with some web pages for fun. Linear tranformations can be applied to any 2D image. It can be

etc.

Here's what we will do. There is a URL entry field on the top left, as well as a table representing the identity matrix I₂. When you enter entries for the matrix and press the "Transform" button, the screen will be tranformed based on the linear transformation defined by your 2x2 matrix. Let's give it a quick try. Before reading any more of this page, change the matrix to

-1	0
0	1

and press the "Transform" button. Then read below.

Now you can enter the URL of a site you want to mess with, and then enter any transformation matrix you want. (You can always enter the identity matrix to return to normal.) Read the notes below if you have any trouble. Have fun!

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• NOTE: If you want to leave this app at any time, press the "Quit" button and you will be returned to our Web Apps page.
• Due to "clickjacking", some major company sites that require user accounts or input won't let you use their URL here, such as google.com, youtube.com, etc.
  Here are some sites that work, as of 5/3/2021:
  
  https://collegemathgames.com
  https://wikipedia.org
  https://ign.com
  https://disney.com
  https://mathworld.wolfram.com/
  https://www.mit.edu/
  https://example.com
• NOTE: If this page did not flip backwards when you entered a different matrix as directed above, you may need to switch to a more recent browser (or upgrade the current one).
• NOTE: If you want to "undo" your last step, enter the inverse of the matrix you just entered. You DO know how to find the inverse of a 2D matrix, right...?