Second order quasilinear PDEs and conformal structures in projective space

P. A. Burovskiy, E. V. Ferapontov, S. P. Tsarev

We investigate second order quasilinear equations of the form f_{ij} u_{x_ix_j}=0 where u is a function of n independent variables x_1, ..., x_n, and the coefficients f_{ij} are fu…