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Feb 24, 2023 at 21:08 comment added R. van Dobben de Bruyn @shenghao 10 years late, but one reference is Tag 0BCW.
Nov 27, 2011 at 5:31 history edited Angelo CC BY-SA 3.0
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Nov 27, 2011 at 4:48 vote accept shenghao
Nov 27, 2011 at 4:48 comment added shenghao Thanks, Angelo. What is this "well known-result" that $C\subset X$ has pure codim. 1 (and any reference)? And I suppose that the cohom. class of an effective divisor in a projective variety is non-zero because one can find another (smooth) effective alg. cycle with non-empty intersection (a finite set of points) with $C,$ right?
Nov 20, 2011 at 8:34 history answered Angelo CC BY-SA 3.0