Characteristic of a ring

Let RING be the category of unital rings, and  an object in it. The object is initial in RING: for every ring there is exactly one momorphism . Thus we can define the characteristic of   to be the unique non-negative generator of the ideal in the PID . In view of the induced isomorphism […]

Posted at 9:48 pm on May 18, 2010 | Leave a comment | Filed Under: Algebra | Continue reading

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