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ECS20 - W22 - Lecture 1 (1T): Intro duration 1 hour 18 minutes ECS20 - W22 - Lecture 1 (1T): Intro ECS20 - W22 - Lecture 1 (1T): Intro	ECS20 - W22 - Lecture 1 (1T): Intro Online lecture (Zoom recording) of 1/4/2022. Course basics. Two example problems: (1) counting the number of paths from the VMC to Pachamama coffee shop; and (2) five riffle shuffles is inadequate… discrete math counting routes shuffling polya puzzles recursion problem sequence cards paths numbers things thing class point kind sequences riffle start deck vertex street claim mathematics card shuffle From Phil Rogaway 0 likes 182 plays 0
ECS 220 9a:2-8.5 Geography game duration 7 minutes 21 seconds ECS 220 9a:2-8.5 Geography game ECS 220 9a:2-8.5 Geography game	ECS 220 9a:2-8.5 Geography game player node graph space nodes game players edge geography blue clause formula formulas cnf names moves idea blues start clauses From David Doty 0 likes 39 plays 0
ECS 120 5c:3 formal definition of TM syntax duration 8 minutes 9 seconds ECS 120 5c:3 formal definition of TM syntax ECS 120 5c:3 formal definition of TM syntax	ECS 120 5c:3 formal definition of TM syntax alphabet element tape input gamma function transition sigma start machine delta blank things turing qa elements symbol head range arrow From David Doty 1 likes 307 plays 0
ECS 120 4c:5 regex_s can simulate NFAs duration 12 minutes 19 seconds ECS 120 4c:5 regex_s can simulate NFAs ECS 120 4c:5 regex_s can simulate NFAs	ECS 120 4c:5 regex_s can simulate NFAs expression transition zeros automata expressions point nfa arrows star epsilon transitions pair string i. thing construction pairs eye paths start From David Doty 1 likes 254 plays 0
ECS 120 4c:4 expression automata duration 2 minutes 8 seconds ECS 120 4c:4 expression automata ECS 120 4c:4 expression automata	ECS 120 4c:4 expression automata expression transition arrow string start bbba input substring interpretation aba strings automata nfa manner semantics syntax followers times substrings words From David Doty 1 likes 183 plays 0
ECS 120 4c:3 NFAs with isolated start and accept… duration 6 minutes 41 seconds ECS 120 4c:3 NFAs with isolated start and accept… ECS 120 4c:3 NFAs with isolated start and accept state	ECS 120 4c:3 NFAs with isolated start and accept state nfa transition start epsilon transitions path prime string a. language idea bit description brand sort proof structure kind expression fact From David Doty 1 likes 165 plays 0
ECS 120 4c:2 NFAs can simulate regex_s example duration 7 minutes 3 seconds ECS 120 4c:2 NFAs can simulate regex_s example ECS 120 4c:2 NFAs can simulate regex_s example	ECS 120 4c:2 NFAs can simulate regex_s example nfa transition epsilon algorithm start union b. singleton cases construction concatenation base star expression goal a. language step steps quicksort From David Doty 1 likes 272 plays 0
ECS 120 4b:3 NFAs can simulate RRGs proof duration 6 minutes 39 seconds ECS 120 4b:3 NFAs can simulate RRGs proof ECS 120 4b:3 NFAs can simulate RRGs proof	ECS 120 4b:3 NFAs can simulate RRGs proof epsilon dfa nfa grammar construction rules g. language rule arrow parts start variables sigma transitions terminal variable gamma row determinism From David Doty 1 likes 196 plays 0
ECS 120 4b:2 RRGs can simulate DFAs proof duration 5 minutes 16 seconds ECS 120 4b:2 RRGs can simulate DFAs proof ECS 120 4b:2 RRGs can simulate DFAs proof	ECS 120 4b:2 RRGs can simulate DFAs proof string rule sequence production d. start transition computation variable subset rules epsilon values g. grammar dfa symbol hindi pre definition From David Doty 1 likes 197 plays 0
ECS 120 4a:5 alternative choices in subset… duration 4 minutes 40 seconds ECS 120 4a:5 alternative choices in subset… ECS 120 4a:5 alternative choices in subset construction	ECS 120 4a:5 alternative choices in subset construction transitions epsilon input delta transition subset start algorithm construction dfa unions function singleton choices problem bridges wood autograder homework language From David Doty 1 likes 188 plays 0
ECS 120 4a:2 example of DFA simulating NFA… duration 14 minutes 44 seconds ECS 120 4a:2 example of DFA simulating NFA… ECS 120 4a:2 example of DFA simulating NFA (subset construction)	ECS 120 4a:2 example of DFA simulating NFA (subset construction) input transition epsilon nfa union subsets transitions subset start dfa symbol arrows a. b. words sets n. proof picture arrow From David Doty 1 likes 455 plays 0
ECS 120 3c:4 NFA Kleene star proof duration 5 minutes 13 seconds ECS 120 3c:4 NFA Kleene star proof ECS 120 3c:4 NFA Kleene star proof	ECS 120 3c:4 NFA Kleene star proof transition epsilon start nfa s. delta thing dfa compliment intersection f1 union star proof anaphase addition transitions n1 concatenation deterministically From David Doty 1 likes 231 plays 0
ECS 120 3c:3 NFA concatenation proof duration 4 minutes 19 seconds ECS 120 3c:3 NFA concatenation proof ECS 120 3c:3 NFA concatenation proof	ECS 120 3c:3 NFA concatenation proof delta transitions n2 transition union point n1 string f1 start epsilon language f2 s1 sigma picture nfa end switch anna From David Doty 1 likes 252 plays 0
ECS 120 3c:2 NFA union proof duration 7 minutes 14 seconds ECS 120 3c:2 NFA union proof ECS 120 3c:2 NFA union proof	ECS 120 3c:2 NFA union proof delta transitions union transition epsilon nfa start n2 function n1 notes lecture sets guess q2 f2 addition language f1 s1 From David Doty 1 likes 226 plays 0
ECS 120 3c:1 NFA Kleene star example duration 8 minutes 20 seconds ECS 120 3c:1 NFA Kleene star example ECS 120 3c:1 NFA Kleene star example	ECS 120 3c:1 NFA Kleene star example nfa epsilon language start star transition problem string input strings thing deterministically idea concatenation dfa l. computation middle bunch things From David Doty 1 likes 716 plays 0
ECS 120 3b:3 NFA union example duration 5 minutes 34 seconds ECS 120 3b:3 NFA union example ECS 120 3b:3 NFA union example	ECS 120 3b:3 NFA union example multiple length nfa dfa start transitions epsilon input union string deterministically size symbols construction checks determinism language ability languages closure From David Doty 1 likes 553 plays 0