[FOM] Equivalence relation on sets of natural numbers

Timothy Y. Chow tchow at alum.mit.edu
Tue Sep 11 10:37:44 EDT 2012

I want to declare that two sets of natural numbers are equivalent if their 
symmetric difference is finite.

Is there a standard term for the resulting family of equivalence classes, 
or for the equivalence relation?  I feel like I've seen this somewhere 
before but I can't recall where.


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