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BDRNEU_LIN Linearize Neumann boundary contributions.

[ C_LCOEF, C_COEF ] = BDRNEU_LIN( C_COEF, C_DVAR, N_BDR ) Attempts to find terms in the boundary coefficients C_COEF with simple linear products of the dependent variables in C_DVAR and linearize them. Returns the linearized coefficients in C_LCOEF and the remaining coefficents in C_COEF (N_BDR specifies the number of boundaries present).