For a given family of groups B, we define an elementary class E(B) as the smallest class of groups, that contains B and is closed under the passing to subgroups, quotients, and taking extensions and direct limits. The properties of these classes are considered. The proposed theory has close connections with the theory of elementary amenable groups as well as of Kuroš – Černikov classes.

conclusions the results showed that life skills training is an effective method in reducing symptoms of depression, anxiety, sleep and somatic disorders. also, it would be useful in reducing problems of social dysfunction. results in life skills training group, depressive and anxiety symptoms, somatization disorders, sleep disorders and disorders of social functioning were significantly decreas...

background: patients with breast cancer are predisposed to some psychiatric symptoms and mental disorders due to their life styles or disease conditions. these problems cause patients to deal with daily stress, feeling guilty, anxiety, dysphoric mood and impaired social relations. such problems will lead to serious mental disorders. therefore, life skills training may help the patients to cope ...

high inflation has been as one of the characteristics of developing countries including iran and its economic and social impacts are extensive. compiling policies for economic development requires that inflation impacts on different social classes should be studied carefully. microeconomic analyses show that because of higher increase in price of goods that have higher share in consumption bund...