Add proof of Lemma 4.98 (Fall 2018) to notes

dcernst / IBL-AbstractAlgebra

IBL course materials for an undergraduate first-semester abstract algebra course that emphasizes visualization.

http://dcernst.github.io/IBL-AbstractAlgebra/

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Add proof of Lemma 4.98 (Fall 2018) to notes #109

Closed dcernst closed 5 years ago

dcernst commented 5 years ago

It's unlikely that students will come up with this proof without substantial hints and I'm not sure it is very enlightening for what follows. I think I should just include the proof.

dcernst commented 5 years ago

Done.