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31:27 Some ideas for math club Some ideas for math club	Some ideas for math club Pascal's triangle, Golden Ratio, Measuring pi row power times side thing triangle rectangle kids numbers base zeros step ratio numerals circle half pi game symbol radius From Joseph Biello 0 likes 13 plays 0
01:25:00 ECS20 - W22 - Lecture 12 (6R): Induction and… ECS20 - W22 - Lecture 12 (6R): Induction and Recursion 1	ECS20 - W22 - Lecture 12 (6R): Induction and Recursion 1 Lecture 2022-02-10. The language of number theory, and the Peano axioms for it. The last axiom: the principle of mathematical induction. Different forms of it. Using induction for establishing… induction mathematical induction peano axioms basis inductive step inductive assumption triominoes envelopes times packs thing numbers n. sum hand proof side assumption step trauma grid packets successor cubed symbol From Phil Rogaway 0 likes 128 plays 0
01:22:02 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 156 plays 0
01:20:06 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 185 plays 0
01:00:09 ECS 235B Winter Quarter 2022, Lecture 2 ECS 235B Winter Quarter 2022, Lecture 2	ECS 235B Winter Quarter 2022, Lecture 2 Lecture 2, on January 5, 2022 of ECS 235B, Foundations of Computer and Information Security island square matrix commands subjects object question symbol edge grant tape machine attributes access control turing end attribute command problem From Matt Bishop 0 likes 40 plays 0
01:20:16 ECS20 - W22 - Lecture 2 (1R): Logic 1 ECS20 - W22 - Lecture 2 (1R): Logic 1	ECS20 - W22 - Lecture 2 (1R): Logic 1 Familiar sets and operators on them. The boolean domain and basic operators on booleans (AND, OR, NOT). Representing numbers in binary, and in other bases. Can you represent anything you care about… boolean logic operators logical operators values truth numbers operator table function thing integers notation symbol representation things base negation word digits variables kind formula From Phil Rogaway 0 likes 147 plays 0
04:16 ECS 120 5a:2 definition of separating extension… ECS 120 5a:2 definition of separating extension and L-equivalence	ECS 120 5a:2 definition of separating extension and L-equivalence extension strings star negation words definition l. sigma language owl exists expansion sim attack symbol y. sin alcohol conditions thing From David Doty 0 likes 114 plays 0
06:12 ECS 220 8a:8.1-2 space-bounded complexity classes… ECS 220 8a:8.1-2 space-bounded complexity classes L and PSPACE	ECS 220 8a:8.1-2 space-bounded complexity classes L and PSPACE space log configuration bits memory orbit input problems symbol pointer pointers class n. classes complexity x. rules size ca rule From David Doty 0 likes 36 plays 0
08:56 ECS 220 7c:7.5-1 Turing's applied philosophy ECS 220 7c:7.5-1 Turing's applied philosophy	ECS 220 7c:7.5-1 Turing's applied philosophy calculus computer paper problem functions lambda function computation question person definition mind instructions machine church hilbert note symbol symbols computers From David Doty 0 likes 16 plays 0
03:08 ECS 220 6a:7.2-1 programming languages with… ECS 220 6a:7.2-1 programming languages with interpreters have non-halting programs	ECS 220 6a:7.2-1 programming languages with interpreters have non-halting programs input programs language programming interpreter source output return javascript universality notion words matter contradiction runs v0 returns symbol question task From David Doty 0 likes 33 plays 0
06:34 ECS 220 3a:5-5.2 circuit to simulate Turing… ECS 220 3a:5-5.2 circuit to simulate Turing machine, Witness-Existence reduces to Circuit-SAT	ECS 220 3a:5-5.2 circuit to simulate Turing machine, Witness-Existence reduces to Circuit-SAT tape circuit machine turing input gates subcircuit configuration witness space steps inputs cells bits head constants output symbol blanks width From David Doty 0 likes 60 plays 0
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 0 likes 235 plays 0
11:37 ECS 120 6a:3 single-tape TMs can simulate… ECS 120 6a:3 single-tape TMs can simulate multitape TMs	ECS 120 6a:3 single-tape TMs can simulate multitape TMs tape configuration symbols dot head symbol blank position blanks tapes alphabet transition machine thing x. cell point multi loops dots From David Doty 1 likes 316 plays 0
14:55 ECS 120 5c:4 formal definition of TM semantics ECS 120 5c:4 formal definition of TM semantics	ECS 120 5c:4 formal definition of TM semantics errata: At 4:38, I incorrectly said and wrote that L,R,S correspond to +1, -1, and 0. They correspond to -1, +1, and 0, i.e., moving left (L) decrements (-1) the tape head position, and moving right… tape configuration position turing symbol machine sequence prime head delta input content move configurations leftmost string semantics dfa constraints words From David Doty 1 likes 223 plays 0
08:09 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 248 plays 0
13:26 ECS 120 5c:2 example TM ECS 120 5c:2 example TM	ECS 120 5c:2 example TM symbol bit transition blank tape machine reverse end input string head simulator transitions x. symbols language arrow beginning side bits From David Doty 1 likes 360 plays 0