constructive mathematics

Hello Cat Group, I first apologize because my question is not directly related to category theory but perhaps some people can point me in the correct direction. Which mail list (hopefully moderated) can help me vis-a-vis a constructive approach to solutions of partial differential equations .... specfifically the Schrodinger equation? Kind regards, Vasili [For admin and other information see: http://www.mta.ca/~cat-dist/ ]