h Badri - Corresponding author; Department of Private Law, Razi University, Kermanshah, Iran
h Torkmalak - Department of Private Law, Razi University, Kermanshah, Iran
m Badri - Department of Private Law, Razi University, Kermanshah, Iran

The single member company was introduced in the nineteenth century as a new phenomenon in act of commercial companies, and European country finally accepted it after a century of silence and hesitation. Among different countries, the single member companies have been faced with major changes in England, Germany, and France. Regarding the various procedures relating to the formation of this type of company, this research attempts to provide a comprehensive survey about this type of company in the act of the proposed countries and the act of Iran, which recently is going to accept these companies. The aim is to answer the following questions: 1-Which type of company can be proper for a single member company? 2-How many is the minimum members for formation and continuing? Can the legal entities establish a single member company? Is there a limit to establish the single member companies for legal and real entities?

Differential evolution algorithm (DE) , Commercial company , Single member company , Legal entity , Iran act