since motion verbs of russian language is one of those complex issues in russian language syntax, iranian students who are learning russian language face problems when learning this grammatical category. these problems in learning appear in two stages. a)the stage of learning and understanding the meaning of these verbs in the russian language itself; b) the stage of transition of these verbs f...

In this paper we consider bi-Cohen-Macaulay graphs, and give a complete classification of such graphs in the case they are bipartite or chordal. General biCohen-Macaulay graphs are classified up to separation. The inseparable bi-CohenMacaulay graphs are determined. We establish a bijection between the set of all trees and the set of inseparable bi-Cohen-Macaulay graphs.

     This project investigates the relationship between lexical semantics and causative morphology in the acquisition of causative/inchoative-related verbs in English as a foreign language by Iranian speakers. Results of translation and picture judgment task show although L2 learners have largely acquired the correct lexico-syntactic classification of verbs in English, they were constrained by ...