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Dec 13, 2011 at 20:16 comment added greg I am quite familar with the sub/supersolution approach, and was unable to get it to work. What are your ideas on the second approach? thanks for all your help.
Dec 13, 2011 at 17:10 comment added timur Two techniques come to mind: Sub-supersolution method, and Leray-Schauder approach. If you need, I can expand on any of these.
Dec 13, 2011 at 14:32 comment added greg and I guess I was supposed to edit my original question and not answer my own question... still trying to figure out how to use this site.
Dec 13, 2011 at 14:29 history answered greg CC BY-SA 3.0