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Mar 9, 2020 at 16:02 history edited Flyingpanda CC BY-SA 4.0
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Mar 9, 2020 at 11:43 comment added Flyingpanda I still don't understand how to figure out this problem. Anyone knows?
Mar 1, 2020 at 8:29 history edited Flyingpanda CC BY-SA 4.0
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Mar 1, 2020 at 8:20 comment added Flyingpanda @Angelo Thank you! I try to write a proof myself. The condition A being normal is necessary, but I don't know why we need to assume noetherian. Would you please explain a little bit more? Thank you!
Mar 1, 2020 at 6:28 comment added Angelo The answer first question is trivially positive. For the second, it is true if $A$ is noetherian and normal, but false in general (think of the normalization).
Feb 29, 2020 at 13:00 history edited Flyingpanda CC BY-SA 4.0
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Feb 29, 2020 at 9:54 history asked Flyingpanda CC BY-SA 4.0