add comment about 0 being the notation for additive identity in rings

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 comment about 0 being the notation for additive identity in rings #124

Closed dcernst closed 2 years ago

dcernst commented 4 years ago

I should comment that we use 0 as the addition identity in rings. Similar comment for 1 in rings. I should also comment that these elements may not be the number 0 or the number 1.

dcernst commented 2 years ago

Done.