CRITICAL ANGLE OF REGULAR INTERACTION UPON COLLISION OF TWO UNIDENTICAL STRONG SKEW SHOCK WAVES IN A GAS WITH A CONSTANT POLYTROPIC INDEX S. K. Andilevko UDC 534.2 In the present work on the basis of relationships of the hydrodynamic theory of shock waves, the author determines a critical angle of existence of a regular collision regime (RCR) for two unidentical plane skew shock waves (SSW) in a gas, the change in the polytropic index of which behind the shock wave front can be neglected. JEPTER7492019994 JEPTER749204