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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 on March 20th, 2021 0 likes 86 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 on March 20th, 2021 1 likes 122 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 on March 20th, 2021 1 likes 152 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 on March 20th, 2021 1 likes 105 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 on March 20th, 2021 1 likes 132 plays 0