10-327/Classnotes for Thursday October 14

DBN: Classes: 2010-11: 10-327/Navigation Additions to the MAT 327 web site no longer count towards good deed points # Week of... Notes and Links 1 Sep 13 About This Class, Monday - Continuity and open sets, Thursday - topologies, continuity, bases. 2 Sep 20 Monday - More on bases, Thursdsay - Products, Subspaces, Closed sets, HW1, HW1 Solutions 3 Sep 27 Monday - the Cantor set, closures, Thursday, Class Photo, HW2, HW2 Solutions 4 Oct 4 Monday - the axiom of choice and infinite product spaces, Thursday - the box and the product topologies, metric spaces, HW3, HW3 Solutions 5 Oct 11 Monday is Thanksgiving. Thursday - metric spaces, sequencial closures, various products. Final exam's date announced on Friday. 6 Oct 18 Monday - connectedness in ${\mathbb {R} }$, HW4, HW4 Solutions, Thursday - connectedness, path-connectedness and products 7 Oct 25 Monday - Compactness of $[0,1]$, Term Test on Thursday, TT Solutions 8 Nov 1 Monday - compact is closed and bounded, maximal values, HW5, HW5 Solutions, Wednesday was the last date to drop this course, Thursday - compactness of products and in metric spaces, the FIP 9 Nov 8 Monday-Tuesday is Fall Break, Thursday - Tychonoff and a taste of Stone-Cech, HW6, HW6 Solutions 10 Nov 15 Monday - generalized limits, Thursday - Normal spaces and Urysohn's lemma, HW7, HW7 Solutions 11 Nov 22 Monday - $T_{3.5}$ and $I^{A}$, Thursday - Tietze's theorem 12 Nov 29 Monday - compactness in metric spaces, HW8, HW8 Solutions, Thursday - completeness and compactness 13 Dec 6 Monday - Baire spaces and no-where differentiable functions, Wednesday - Hilbert's 13th problem; also see December 2010 Schedule R Dec 13 See December 2010 Schedule F Dec 20 Final exam, Monday December 20, 2PM-5PM, at BR200 Register of Good Deeds Add your name / see who's in! See Hilbert's 13th

See some blackboard shots at BBS/10_327-101014-142707.jpg.

Dror's notes above / Student's notes below

Here are some lecture notes..

Lecture 9 page 1

Lecture 9 page 2

Lecture 9 page 3

Lecture 9 page 4

Lecture 9 page 5

Lecture 9 page 6

Riddles

The Dice Game

Two players A and B decide to play a game. Player A takes 3 blank dice and labels them with the numbers 1-18. Player B then picks one of the three die. Then Player A picks one of the remaining two die. The players then roll their dice, and the highest number wins the round. They play 10,023 rounds. Who would you rather be Player A or B?

Almost Disjoint Subsets

Find an uncountable collection of subsets of $\mathbb {N}$ such that any two subsets only contain a finite number of points in their intersection. Don't cheat by using the axiom of choice!

10-327/Solution to Almost Disjoint Subsets

• I wasn't there for this riddle but it sounded interesting, though I might have the phrasing wrong - John.
• Feel free to cheat and use the axiom of choice - I don't see how it would help anyway. Drorbn 17:40, 18 October 2010 (EDT)

Solutions

4 Solutions to problems in Munkre's book regard to Metrics and Metric topology. -Kai Xwbdsb 16:47, 28 October 2010 (EDT)