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01:24:59 ECS20 - W22 - Lecture 15 (8T): Integers and the… ECS20 - W22 - Lecture 15 (8T): Integers and the Pigeonhole Principle	ECS20 - W22 - Lecture 15 (8T): Integers and the Pigeonhole Principle Lecture 2022-02-22. Three statements of the pigeonhole principle (PHP) and quite a few examples of its use. Reviewing some number theory. The Division Theorem. Euclid's algorithm. Finding… numbers pigeons principle friends points gcd mod sum pigeonhole party point sphere sequence algorithm hemisphere cardinality theorem From Phil Rogaway 0 likes 86 plays 0
47:08 EPS 131 Lecture 22 (First Part) EPS 131 Lecture 22 (First Part)	EPS 131 Lecture 22 (First Part) EPS 131 Lecture 22 (First Part) hurricane storms storm hurricanes air wind eye ocean water energy hour landfall orleans surface cyclones katrina hemisphere cyclone heat winds From John Rundle 0 likes 4 plays 0
48:12 EPS 131 Lecture 19 EPS 131 Lecture 19	EPS 131 Lecture 19 EPS 131 Lecture 19 ocean earth surface currents hemisphere water temperature cells equator climate circulation pressure air winds wind north radiation heat weather coriolis From John Rundle 0 likes 14 plays 0