Different approaches in the theory of the metastable phase decay on   several types of heterogeneous centers
  The situation of the metastable phase decay on the several types of heterogeneous centers is considered. The iteration procedure is formulated and with the help of the avalanche consumption property all iterations can be calculated. The same procedure is done for the monodisperse approximation. Here the avalnche consumption is also used to calculate iterations. It is shown that all iterations with a high number have one and the same structure. It allows to obtain the functional form of solution and to formulate directly an equation on the parameter of this functional form. 
V.Kurasov (Saint-Petersburg State University)