... | @@ -50,6 +50,9 @@ Structures further down and/or to the right are special cases of those further u |
... | @@ -50,6 +50,9 @@ Structures further down and/or to the right are special cases of those further u |
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<th>[ Division ring](http://en.wikipedia.org/wiki/Division_ring)</th>
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<th>[ Division ring](http://en.wikipedia.org/wiki/Division_ring)</th>
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<th>[ Field](http://en.wikipedia.org/wiki/Field_%28mathematics%29)</th></tr></table>
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<th>[ Field](http://en.wikipedia.org/wiki/Field_%28mathematics%29)</th></tr></table>
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See also [ Semiring](http://en.wikipedia.org/wiki/Semiring), which also lies between commutative monoid and ring.
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## The Num class
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## The Num class
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