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Jan 8, 2020 at 2:56 history edited Jim Humphreys CC BY-SA 4.0
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Sep 28, 2019 at 0:46 history edited Jim Humphreys CC BY-SA 4.0
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Sep 26, 2019 at 21:42 comment added Jim Humphreys @Sushil: Sorry for the long delay in answering, but it's been a busy week. I did try to add to my answer but didn't succeed. Anyway, I think your formulation is correct. But it's unhelpful in terms of computability. More details to follow.
Sep 22, 2019 at 12:57 comment added Sushil Thank you for your help. I have given a description of $\hat H'$. Could you please tell whether it is correct or not?
Sep 22, 2019 at 2:26 history answered Jim Humphreys CC BY-SA 4.0