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Feb 19, 2012 at 19:30 vote accept Janos Erdmann
Mar 3, 2011 at 20:36 comment added Greg Marks Well said. Another example of one of those useful ring-theoretic properties is that every prime ideal is completely prime (for $q$ not a root of unity). This would seem to go without saying, but since the question was asked--the study of any mathematical object is generally advanced by being able to view the object as a special case of something with a well-developed theory.
Mar 3, 2011 at 19:17 history answered Zoran Skoda CC BY-SA 2.5