Search for tag: "completeness"

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ECS20 - W22 - Lecture 4 (2R): Logic 3 duration 1 hour 22 minutes ECS20 - W22 - Lecture 4 (2R): Logic 3 ECS20 - W22 - Lecture 4 (2R): Logic 3	ECS20 - W22 - Lecture 4 (2R): Logic 3 Building a circuit for adding two 64-bit values. Tautologies. A formal system for proving theorem. The completeness and soundness theorems for sentential logic. Adding quantifier: first-order… circuit adder tautology formal proofs completeness soundness first-order logic formula truth logic table bit proof kind universe phi assumptions statement variables carry statements axioms function english symbol From Phil Rogaway 0 likes 164 plays 0
ECS20 - W22 - Lecture 3 (2T): Logic 2 duration 1 hour 20 minutes ECS20 - W22 - Lecture 3 (2T): Logic 2 ECS20 - W22 - Lecture 3 (2T): Logic 2	ECS20 - W22 - Lecture 3 (2T): Logic 2 Review (particularly of functional completeness). More boolean operators: IMPLIES, IFF, XOR, NAND, NOR. Gates and circuits. A formal treatment of boolean formulas: syntax, truth assignments, and… boolean operators implies xor iff truth assignment truth table equivalence functional completeness nand nor gate circuit truth formula symbols symbol phi parentheses table formulas operators meaning values function assignment operator From Phil Rogaway 0 likes 192 plays 0
ECS 220 8b:8.3-1 NL-completeness and logspace… duration 5 minutes 39 seconds ECS 220 8b:8.3-1 NL-completeness and logspace… ECS 220 8b:8.3-1 NL-completeness and logspace reductions	ECS 220 8b:8.3-1 NL-completeness and logspace reductions space log completeness reduction reductions output problem notion reachability edge input graph nodes tape np pair thing star lot problems From David Doty 0 likes 37 plays 0
ECS 220 6c:7.2-4 Gödel’s… duration 5 minutes 26 seconds 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 0 likes 25 plays 0
ECS 120 9a:2 reducibility duration 5 minutes 27 seconds ECS 120 9a:2 reducibility ECS 120 9a:2 reducibility	ECS 120 9a:2 reducibility algorithm problem reduction reductions kind problems subroutine instance b. x. terrain proof completeness np examples answer times introduction y. equals From David Doty 0 likes 259 plays 0
ECS 120 8a:3 introduction to NP-completeness and… duration 4 minutes 47 seconds 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 307 plays 0