Collection of Open Letters to the Youth of the Islamic world :
We need to Inform the successes of the Academy of Sciences of the Islamic World, in the field of economics, based on relative extremum in the theory of consumption function and demands in the Iranian school of economy, no society will be without the option of consumption and demand, for each member of society there will essentially be production and cost therefore we have:
a relative minimum value x = -1: f
a relative maximum value x = 3/2: f
The fundamental principle in this theory is that any society is formed based on needs and requirements.