online resources

Short proofs from Oct. 20th class

I wrote up clear proofs of the three statements we worked on in class on Wednesday, with some comments.
Adobe Acrobat file icon 20oct proofs.pdf116K Download View

Online Matrix Calculator

This website allows you to manipulate matrices in various ways.  For example, to multiply two matrices, you can store each in the memory separately, as M1 and M2, and then compute M1*M2.

Online Row Reducer

This website has a really handy row reducer that you can use to check your work. 
Send questions about this workspace to Luke Wolcott.