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Oct 15, 2011 at 23:23 comment added David Feldman If I recall, commutative algebra abounds with arguments where one needs to see that a quantity defined, perhaps, by a determinant, or by something even more complicated, sits in a certain ideal, perhaps up to some dominant term. The subject isn't fresh enough in my mind for me to narrow down to the killer examples.
Oct 15, 2011 at 9:45 history answered Julien Puydt CC BY-SA 3.0