Proofs by cont. for discussion

Posted on August 22, 2012 by tkemp
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Media Folder Description:

These three samples of proofs by contradiction are used to illustrate when contradiction should (and shouldn’t) be used as a proof strategy. Students identify which proofs shouldn’t use contradiction and suggest revisions of those proofs. Developed by Todd Kemp and Joel B. Lewis.

Files in this media folder:
all files in this media folder as a single zip file.
Folder content licensed by M.I.T. Department of Mathematics under the license:
CC BY-NC-SA (Attribution-NonCommercial-ShareAlike)

What is Math Comm

MAA Mathematical Communication ( is a developing collection of resources for engaging students in writing and speaking about mathematics. The site originated in the MIT Department of Mathematics and was expanded through support from an NSF grant.