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04:47 ECS 120 8a:3 introduction to NP-completeness and… ECS 120 8a:3 introduction to NP-completeness and Boolean formulas	ECS 120 8a:3 introduction to NP-completeness and Boolean formulas np problem problems precedence formula negation end algorithm multiplication bar numbers equals table truth symbol sense words completeness parentheses print From David Doty 0 likes 155 plays 0
11:48 ECS 120 2b:3 formal definition of CFG semantics ECS 120 2b:3 formal definition of CFG semantics	ECS 120 2b:3 formal definition of CFG semantics string parentheses arrow rule cfg statement derivation sequence strings language context couple epsilon grammar programming tree terminals rules languages parse From David Doty 1 likes 180 plays 0
07:20 ECS 120 2b:1 CFG introduction ECS 120 2b:1 CFG introduction	ECS 120 2b:1 CFG introduction rule parentheses variable symbol colon context string strings side rules thing zeros start a1 grammar epsilon language things grammars b. From David Doty 1 likes 224 plays 0
10:01 ECS 120 2a:3 conventions and the tree view of… ECS 120 2a:3 conventions and the tree view of regex_s	ECS 120 2a:3 conventions and the tree view of regex_s expression union concatenation star thing precedence times expressions parentheses operations language string bit tree associativity base left b. things dfa From David Doty 1 likes 151 plays 0
10:23 ECS 120 2a:2 regex formal definition ECS 120 2a:2 regex formal definition	ECS 120 2a:2 regex formal definition string symbol expression language parentheses alphabet cases symbols r2 star r1 concatenation base union expressions input syntax definition operator rejects From David Doty 1 likes 179 plays 0