TY - JOUR ID - Prykarpatska2005 LB - Prykarpatska2005 AU - Prykarpatska, Natalia K. AU - Pytel-Kudela, Marzena TI - On the structure of characteristic surfaces related with partial differential equations of first and higher orders. Part 1 ST - On the structure of characteristic surfaces related with partial differential equations of first and higher orders. Part 1 JO - Opuscula Math. JA - Opuscula Math. JF - Opuscula Mathematica PY - 2005 VL - 25 IS - 2 SP - 299 EP - 306 DO - http://dx.doi.org/10.7494/OpMath.2005.25.2.299 UR - http://dx.doi.org/10.7494/OpMath.2005.25.2.299 AB - The geometric structure of characteristic surfaces related with partial differential equations of first and higher orders is studied making use the vector field technique on hypersurfaces. It is shown, that corresponding characteristics are defined uniquely up to some smooth tensor fields, thereby supplying additional information about the suitable set of their solutions. In particular, it may be very useful for studying asymptotic properties of solutions to our partial differential equations under some boundary conditions. KW - characteristic surface KW - vector fields KW - tangency KW - Monge cone KW - tensor fields SN - 1232-9274 ER -