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I asked this on Mathematics StackExchange some time ago and got good responses: https://math.stackexchange.com/a/13281 https://math.stackexchange.com/a/13281
by Zolomon 5y ago
I asked this on Mathematics StackExchange some time ago and got good responses:
https://math.stackexchange.com/a/13281 https://math.stackexchange.com/a/13281