Are the following sets fields: the empty set, {0} {0,1}? (it's that I've seen {0,1} as an example of a field yet I thought for any element of a field, there must be another element such as the sum of the two is equal to zero.(adsbygoogle = window.adsbygoogle || []).push({});

Also while I'm asking silly questions: what is the cardinality of the hyperreals?

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# Silly questions about sets and fields

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