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- W2154652085 abstract "A new system, that of matrix grammars, for two-dimensional picture processing, is introduced. A hierarchy, induced on Chomsky's is found. Language operations such as union, catenation (row and column), Kleene's closure (row and column), and homomorphisms are investigated. It is found that the smallest class of these languages may serve as the class of arrays, which is defined as the smallest class of arrays closed under union, catenation (row and column) and Kleene's closure (row and column). Eight possible ways of defining a matrix language are discussed and it is suggested that one of them may lead to a normal form of matrix grammars. The method is advantageous over others on several points. Perhaps the most interesting of all is that it provides a compromise between purely sequential methods, which take too much time for large arrays and purely parallel methods, which usually take too much hardware for large arrays." @default.
- W2154652085 created "2016-06-24" @default.
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- W2154652085 date "1976-07-14" @default.
- W2154652085 modified "2023-09-26" @default.
- W2154652085 title "Sequential/parallel matrix picture languages" @default.
- W2154652085 doi "https://doi.org/10.1145/563274.563276" @default.
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