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01:25:00 ECS20 - W23 - Lecture 19 (10T): Graphs ECS20 - W23 - Lecture 19 (10T): Graphs	ECS20 - W23 - Lecture 19 (10T): Graphs Lecture of 2022-03-08. Example of graphs. Informal description of isomorphism. Formal definition of isomorphic graphs. Status of deciding GRAPH ISOMORPHISM and of proving that two graphs are… graph vertices edges vertex graphs edge degree cycle degrees problem algorithm sum matrix clique bipartite From Phil Rogaway 0 likes 81 plays 0
07:50 ECS 220 5c:6.6 why is it hard to prove P neq NP ECS 220 5c:6.6 why is it hard to prove P neq NP	ECS 220 5c:6.6 why is it hard to prove P neq NP statement algorithm clique proof problems algorithms np star size circuits circuit reason instance fact sat end threshold boolean instances gates From David Doty 0 likes 21 plays 0
09:25 ECS 220 5b:6.6-4 two lemmas and full proof of… ECS 220 5b:6.6-4 two lemmas and full proof of Ladner_s theorem	ECS 220 5b:6.6-4 two lemmas and full proof of Ladner_s theorem clique strings statement stage steps qi a. y. problem length lemma string input table answer statements language conditions condition return From David Doty 0 likes 20 plays 0
07:35 ECS 220 5b:6.6-2 almost proof of Ladner's… ECS 220 5b:6.6-2 almost proof of Ladner's theorem	ECS 220 5b:6.6-2 almost proof of Ladner's theorem clique stage stages programs q0 strings string output problem x. point reduction np formula proof bees a. input reductions booleans From David Doty 0 likes 22 plays 0
07:45 ECS 220 5b:6.6-1 Ladner's theorem, existence… ECS 220 5b:6.6-1 Ladner's theorem, existence of NP-intermediate problems	ECS 220 5b:6.6-1 Ladner's theorem, existence of NP-intermediate problems problem np string problems theorem length a. answers strings satisfiability evidence complete clique things answer language sac words x. numbers From David Doty 0 likes 30 plays 0
06:08 ECS 220 5a:6.4-2 P^SAT and P^NP ECS 220 5a:6.4-2 P^SAT and P^NP	ECS 220 5a:6.4-2 P^SAT and P^NP oracle problem inputs clique p2 question half problems class complexity portion circuit formula exists pi np fact sap sat sac From David Doty 0 likes 56 plays 0
08:48 ECS 220 2a:4.2-4 Clique, Independent-Set,… ECS 220 2a:4.2-4 Clique, Independent-Set, Vertex-Cover	ECS 220 2a:4.2-4 Clique, Independent-Set, Vertex-Cover nodes edges graph size problem cover vertex clique optimization pair subset decision polynomial edge words concept question threshold rivalries party From David Doty 0 likes 39 plays 0
03:43 ECS 120 8c:4 Cook-Levin Theorem if P neq NP, then… ECS 120 8c:4 Cook-Levin Theorem if P neq NP, then no NP-complete problem is in P	ECS 120 8c:4 Cook-Levin Theorem if P neq NP, then no NP-complete problem is in P reduction notes lecture problem np theorem problems cook question sat clique reductions levin complete object sense couple age examples width From David Doty 0 likes 140 plays 0
06:53 ECS 120 8b:3 using reductions to bound hardness… ECS 120 8b:3 using reductions to bound hardness of problems	ECS 120 8b:3 using reductions to bound hardness of problems input length algorithm instance answer thing b. cubed contrapositive problems c. decider mb x. function nb proof a. reducible clique From David Doty 0 likes 185 plays 0
11:52 ECS 120 8b:2 definition of polynomial-time… ECS 120 8b:2 definition of polynomial-time reducibility	ECS 120 8b:2 definition of polynomial-time reducibility Errata: starting at 8:30, I show Python code with the function reduction_from_clique_to_independent_set. This should be reduction_from_independent_set_to_clique instead. algorithm clique instance strings reduction b. input graph star problem idea answer a. output function compliment nodes pair requirement difficulty From David Doty 0 likes 235 plays 0
07:22 ECS 120 8b:1 reducing IndSet to Clique ECS 120 8b:1 reducing IndSet to Clique	ECS 120 8b:1 reducing IndSet to Clique graph clique edges problem algorithm nodes edge pair gi subroutine pairs c. node compliment transformation g. definition reduction instances types From David Doty 0 likes 223 plays 0
09:55 ECS 120 7c:4 example problem in NP - SubsetSum ECS 120 7c:4 example problem in NP - SubsetSum	ECS 120 7c:4 example problem in NP - SubsetSum collection subset sum clique proof integers problem np graph size numbers element times problems c. addition s. python witness thing From David Doty 1 likes 199 plays 0
07:02 ECS 120 7c:3 example problem in NP - Clique ECS 120 7c:3 example problem in NP - Clique	ECS 120 7c:3 example problem in NP - Clique clique size nodes graph verifier pairs problem input words pair problems iteration iterations loop g. threshold linear execution ways python From David Doty 1 likes 264 plays 0
01:09 VEN 101C: Week 6 - Video 1 VEN 101C: Week 6 - Video 1	VEN 101C: Week 6 - Video 1 cartons nada plants berms tubes effect point place clique bugs clothes kids bit dharmas sees poets foliage routes goals garments From Christopher Chen 0 likes 51 plays 0