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(Edit) My question is as follows: My previous question was about a kind of "strict-transform birational" invariant not birational invariants as usual. So I just delete the question since it complicated to state the definition and I want to think for by myself. Sorry about that.

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Are you still asking a question? Is you 'previous question' in fact this question? – David Roberts Jan 13 '12 at 4:08
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In order to delete the question, you should click on "delete" at the bottom of it. Otherwise, it remains visible. – Francesco Polizzi Jan 13 '12 at 8:52

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