Recently, it has been shown that every recursively enumerable language can be generated by a scattered context grammar with no more than three nonterminals. However, in that construction, the maximal number of nonterminals simultaneously rewritten during a derivation step depends on many factors, such as the cardinality of the alphabet of the generated language and the structure of the generate...

Linear extended multi bottom-up tree transducers are presented in the framework of synchronous grammars, in which the input and the output tree develop in parallel by rewriting linked nonterminals (or states). These links are typically transient and disappear once the linked nonterminals are rewritten. They are promoted to primary objects here, preserved in the semantics, and carefully studied....

symbol is a term. a term or an index which has some paradoxical meanings, in addition to its conventional meaning. symbols are not innovated, they come from human's creative dreams and imaginations and they show unknown things.old men didn't think about their symbols, they lived with them. so we, as interpreters of dreams, should pay attention not only to the symbol by itself, but als...

This article is about the comparative study of symbol in architecture and contemporary Seljuk tombs in Iran. Art is one of the arts associated with various sciences and science concepts, and various features of footprints can be seen. The signs and symbols of architectural buildings and monuments can be helpful. especially for the beauty of motifs and composition, and roles and indications sugg...

identity is one of those symbols which are influenced by variety of factors. since civilization and culture consists of physical and spiritual manifestations left behind by the mankind throughout the history, the tools and the items used by them becomes extremely important when studying their culture. by studying the symbols and the myths which are reflection of the people who used these items,...

Rosa: Tape 1, Side B The recording begins in a delicatessen. Rosa is with her mother and twin brother. Over the noise of cars passing the shop, Rosa’s mother can be heard ordering some Cabanas while Rosa sings a song by her favourite pop group 5ive. As they leave the shop, Rosa says goodbye to the shopkeeper who had given the twins a free meat pie each. Their mother asks them to wait until they...