摘要：The operator of act can be applied in the conditions of associating to other two operators: the operator of existence and the operator of membership. Starting from these remarks,we can exemplify the acting mode of the operator of act by increasing the capacity of a firm,and then because the incompatibility between the capacity and labor force,we have to apply again the operator of act. One of the elements of invisible statistics is tax dodging. The tax dodging is one of the most complexes social and economic phenomenon of a top importance which countries are faces,and whose unwanted consequences are tried to be tempered. There are three areas of tax payers: “white” area,“black” area and “grey” area. Also we analyze the fiscal pressure.
关键词：fiscal pressure;fuzzy set;invisible statistics;legal fraud;operator of act;variable;tax dodging
