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IBL task sequence for an introduction to proof course.

branch: master


These notes are an IBL task sequence for an introduction to proof course. The task-sequence was written by Dana Ernst (Northern Arizona University), but the first half of the notes are an adaptation of notes written by Stan Yoshinobu (Cal Poly) and Matthew Jones (California State University, Dominguez Hills). Any errors in the notes are no one's fault but my own. In this vein, if you think you see an error, please inform me, so that it can be remedied.

License Information

This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 license. You are free to:

  • Share: copy, distribute, and transmit the work,
  • Remix: adapt the work

Under the following conditions:

  • Attribution: You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
  • Share Alike: If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.

When attributing this work, please include Stan and Matt, as well as me.


You can find the most up-to-date version of these notes on Github. I would be thrilled if you used these notes and improved them. If you make any modifications, you can either make a pull request on Github or submit the improvements to me at

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