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Post Closed as "Not suitable for this site" by Ricardo Andrade, Theo Johnson-Freyd, Andrey Rekalo, Willie Wong, Stefan Kohl♦

occurred Nov 27, 2013 at 11:01

removed deprecated tag 'analysis' (since question was bumped to the front page)

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edited Nov 26, 2013 at 20:34

Ricardo Andrade

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analysis ap.analysis-of-pdes

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asked Jul 11, 2012 at 15:25

1

Nearly elliptic equations

If you have a second order elliptic equation but the coefficients of the second order terms only form a nonnegative (instead of positive definite) matrix, then, do you know if there is any literature about this? (For example, the matrix of the second order terms can be diag{1,1,0,0} )

analysis