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when toggle format what by license comment
Mar 12, 2019 at 10:53 comment added Chris Thank you for your help. I was not aware of the general theorem, but this simple proof is quite elegant.
Mar 11, 2019 at 16:35 history edited Yemon Choi CC BY-SA 4.0
small addition with additional context
Mar 11, 2019 at 16:32 vote accept Chris
Mar 11, 2019 at 16:07 history answered Yemon Choi CC BY-SA 4.0