Klein Four Actions on Graphs and Sets
We consider how a standard theorem in algebraic geometry relating properties of a curve with a (ℤ/2ℤ)2-action to the properties of its quotients generalizes to results about sets and graphs that admit (ℤ/2ℤ)2-actions.
Glass, Darren B. "Klein Four Actions on Graphs and Sets." The American Mathematical Monthly 124, no. 6 (June-July 2017). pp. 543-547.
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