Kirchoff's type representations of the DKO for the homogeneous medium prompts the general form of an integral KO:

(99) |

where - negative weight function, - propagation time from to with accordance with a given eiconal equation

(100) |

Without any lack of generality we can put *n*=0. We propose that

and

(101) |

It is well known that

It is easy to show that when point is placed behind the front (where is the correspondent solution of equation (100) with condition ), then argument of -function at is always positive:

1/13/1998