Search for tag: "proof"

47 Media

01:01:00 ECS 153, Spring 2021; Lecture #11; April 21, 2021 ECS 153, Spring 2021; Lecture #11; April 21, 2021	ECS 153, Spring 2021; Lecture #11; April 21, 2021 ECS 153 Spring 2021. Computer Security. This finishes the discussion of security policies. The video begins at 10:28 from the beginning. things level access policies network language confidentiality languages programs database control identity mechanisms permission directory lawyers test proof point trust From Matt Bishop on April 21st, 2021 0 likes 54 plays 0
01:21:21 ECS 289A Lecture 7a ECS 289A Lecture 7a	ECS 289A Lecture 7a linear leader function delta species things thing functions kind predicates input inputs stuff sense configurations proof increment machine integer semi From David Doty on March 22nd, 2021 0 likes 8 plays 0
01:26:51 ECS 289A Lecture 6b ECS 289A Lecture 6b	ECS 289A Lecture 6b sequence element vectors elements delta thing proof integers configuration species lemma configurations things reactions vector graph point stuff union output From David Doty on March 22nd, 2021 0 likes 7 plays 0
15:53 ECS 220 9b:8.5 Immerman-Szelepcsényi… ECS 220 9b:8.5 Immerman-Szelepcsényi Theorem NSPACE(s(n)) = coNSPACE(s(n)) for s(n) ≥ log(n)	ECS 220 9b:8.5 Immerman-Szelepcsényi Theorem NSPACE(s(n)) = coNSPACE(s(n)) for s(n) ≥ log(n) space nodes reachability path algorithm node error steps bit proof paths length end graph zeros pad linear log guesses step From David Doty on March 21st, 2021 0 likes 15 plays 0
03:52 ECS 220 9a:1-8.6 IP=PSPACE (no proof) ECS 220 9a:1-8.6 IP=PSPACE (no proof)	ECS 220 9a:1-8.6 IP=PSPACE (no proof) space verifier bit prover strategy fee formula proof game power words bits class b. fact p. variant sort bpp quarter From David Doty on March 21st, 2021 0 likes 10 plays 0
05:26 ECS 220 6c:7.2-4 Gödel’s… ECS 220 6c:7.2-4 Gödel’s Incompleteness Theorem (consistency)	ECS 220 6c:7.2-4 Gödel’s Incompleteness Theorem (consistency) proof string epsilon guessing statement answer problem input algorithm godel completeness consistency searches theorem computation prove air negation programs contradiction From David Doty on March 21st, 2021 0 likes 11 plays 0
06:36 ECS 220 6c:7.2-3 Gödel’s… ECS 220 6c:7.2-3 Gödel’s Incompleteness Theorem (soundness)	ECS 220 6c:7.2-3 Gödel’s Incompleteness Theorem (soundness) statement proof theorem problem statements godel contradiction machines negation systems stuff incompleteness distinction parallel tuple things turing programs language hilbert From David Doty on March 21st, 2021 0 likes 12 plays 0
05:55 ECS 220 6c:7.2-2 From undecidable problems to… ECS 220 6c:7.2-2 From undecidable problems to unprovable truths	ECS 220 6c:7.2-2 From undecidable problems to unprovable truths statement rules proof axioms inference statements proofs contradiction reasoning thing systems hilbert 30s bit answer algorithm string kind negation properties From David Doty on March 21st, 2021 0 likes 13 plays 0
11:33 ECS 220 6b:7.2-3 computable enumerability ECS 220 6b:7.2-3 computable enumerability	ECS 220 6b:7.2-3 computable enumerability proof input numbers p. characterization w. inputs steps enumerator amount problems loop direction verifier halts answer instance fact problem np From David Doty on March 21st, 2021 0 likes 20 plays 0
08:46 ECS 220 6b:7.2-2 showing problems are undecidable… ECS 220 6b:7.2-2 showing problems are undecidable by reduction from halting problem	ECS 220 6b:7.2-2 showing problems are undecidable by reduction from halting problem input problem epsilon question string thing reduction problems halts output behavior lot divisor x. function notion circuit numbers proof condition From David Doty on March 21st, 2021 0 likes 28 plays 0
06:00 ECS 220 6b:7.2-1 halting problem ECS 220 6b:7.2-1 halting problem	ECS 220 6b:7.2-1 halting problem input halts catch-22 programs inputs source problem table contradiction proof string rows coder diagonalization kind subroutine algorithm problems class output From David Doty on March 21st, 2021 0 likes 23 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 on March 21st, 2021 0 likes 14 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 on March 21st, 2021 0 likes 13 plays 0
03:07 ECS 220 5a:6.4-3 relativizing proofs ECS 220 5a:6.4-3 relativizing proofs	ECS 220 5a:6.4-3 relativizing proofs oracle proof problems subset a. access arguments simulation classes complexity question np n. running hierarchy fact problem programs property instruction From David Doty on March 21st, 2021 0 likes 19 plays 0
08:37 ECS 220 4b:6.1-2 relation of NP to finding… ECS 220 4b:6.1-2 relation of NP to finding mathematical proofs	ECS 220 4b:6.1-2 relation of NP to finding mathematical proofs proof problem proofs statement problems np optimization mathematics angle steps computer reasons machine algorithm question rules geometry understanding evidence kepler From David Doty on March 21st, 2021 0 likes 19 plays 0
07:19 ECS 220 4a:6.1-3 collapse propagates up padding… ECS 220 4a:6.1-3 collapse propagates up padding technique	ECS 220 4a:6.1-3 collapse propagates up padding technique input length cubed algorithm deterministically problem question linear string x. end padding proof fact np cube function lot size season From David Doty on March 21st, 2021 0 likes 24 plays 0