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Aug 2, 2016 at 11:20 comment added Sebastian Goette The problem is your first display, where $D_1$ and $D_2$ seem to commute. Then the math.stackexchange answer is correct. To get an elliptic operator, you want $D_1$ and $D_2$ to anticommute, which gives your formula for the kernel.
Jul 13, 2016 at 16:01 comment added Ho Man-Ho I hope I have not misunderstood the meaning there
Jul 13, 2016 at 16:00 comment added Ho Man-Ho There are some. In particular, this one math.stackexchange.com/questions/541541/…
Jul 13, 2016 at 7:30 comment added Sebastian Goette Could you provide a link to the mathstackexchange question, please?
S Jul 12, 2016 at 17:22 history suggested Ali Taghavi
I add a tag
Jul 12, 2016 at 17:14 review Suggested edits
S Jul 12, 2016 at 17:22
Jul 10, 2016 at 16:24 history asked Ho Man-Ho CC BY-SA 3.0