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Mar 5, 2014 at 8:51 vote accept Willie Wong
Mar 5, 2014 at 8:51 answer added Willie Wong timeline score: 1
Sep 5, 2011 at 18:33 comment added Deane Yang Willie, I once needed something similar. In my paper, Local solvability of overdetermined systems defined by commuting first-order differential operators. Communications on Pure and Applied Mathematics, 39 (1986) 401–421, I mention that a "lens-shaped domain" can be used to solve a certain class of overdetermined elliptic systems, and show that more generally a "ravioli-shaped domain" can be used to solve a more general class of systems. I don't know of anyone else who has ever used such domains and foliations.
Sep 5, 2011 at 17:49 history asked Willie Wong CC BY-SA 3.0