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Jun 11, 2014 at 19:27 comment added username wrong sign: it would be the case for $-\Delta u -u^3=U$.
S Jun 11, 2014 at 14:16 review Late answers
Jun 11, 2014 at 14:20
S Jun 11, 2014 at 14:16 review First posts
Jun 11, 2014 at 14:27
Jun 11, 2014 at 13:57 history answered demairena CC BY-SA 3.0