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Various subsemirings of the field \(\mathbb Q\) of rational numbers. (English) Zbl 1192.16044

Summary: The present brief note collects various results concerning subsemirings of \(\mathbb Q\). All these results are fairly basic, quite elementary and of folklore character to much extent. Therefore, we make no attempt to attribute them to any particular source.

MSC:

16Y60 Semirings
12K10 Semifields
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