Abstract. It is well known that modelchecking and satisfiability of Linear Temporal Logic (LTL) are Pspace-complete. Wolper showed that with grammar operators, this result can be extended to increase the expressiveness of the logic to all regular languages. Other ways of extending the expressiveness of LTL using modular and group modalities have been explored by Baziramwabo, McKenzie and Th							
						
							
					 															
					Kamal Lodaya, A. V. Sreejith