I'm reading up on maximal sets and the word "coinfinite" pops up in the first sentence. I tried searching on Wolfram Mathworld as well as Google, but nothing concrete has come up. What does it mean and in what context can it be used?
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Perhaps it means the complement is infinite. Certainly "cofinite" and "cocountable" are used this way. 


See Wikipedia article "Cofiniteness". 

