discrete topology - 2023 Penn Bowl

Question

The metric that is equal to 1 if x is not equal to y, and equal to 0 if x is equal to y induces this topology. For 10 points each:

[10h] Identify this finest possible topology in which all subsets are open.

ANSWER: discrete topology

[10e] Any function from the discrete topology to another topological space always has this property because the pullback is always open. Functions with this property can be sketched without lifting the pencil from the paper.

ANSWER: continuity [or continuous functions]

[10m] The discrete topology has this property if it is finite. Topological spaces have this property if every open cover contains a finite subcover.

ANSWER: compactness

Back to bonuses

Summary


2023 Penn Bowl @ Waterloo	10/28/2023	Y	4	27.50	100%	100%	75%
2023 Penn Bowl @ FSU	10/28/2023	Y	2	15.00	100%	50%	0%
2023 Penn Bowl (Harvard)	10/21/2023	Y	3	20.00	100%	67%	33%
2023 Penn Bowl (Mainsite)	10/21/2023	Y	6	21.67	100%	67%	50%
2023 Penn Bowl (Norcal)	10/28/2023	Y	2	20.00	100%	100%	0%
2023 Penn Bowl (South Central)	10/28/2023	Y	3	20.00	100%	67%	33%
2023 Penn Bowl (UK)	10/28/2023	Y	5	24.00	100%	100%	40%
2023 Penn Bowl @ UNC	10/28/2023	Y	4	22.50	100%	75%	50%

Data


Berkeley A	Berkeley C	0	10	10	20
Stanford	Berkeley B	0	10	10	20
Texas A	Oklahoma B	10	10	10	30
Oklahoma A	Texas B	0	10	0	10
Rice	Texas C	0	10	10	20
La Clique du Château	Toronto Weary	10	10	10	30
Library of Babel School of Continuing Studies	Toronto Rofl	10	10	10	30
Waterloo Hatsune	Mixed-Affiliated Contingency, Off the Team & Absent: Wong, Adrian	0	10	10	20
Toronto Joy	Waterloo Miku	10	10	10	30
Old London Town	10 Negs that Shook the Quiz	0	10	10	20
Tabearnacle	3HK1MM	10	10	10	30
Betrayed by Rita Izzatdust	Scottish, Irish, Both or Neither	10	10	10	30
Broken Hearts	Four Neg Omelette	0	10	10	20
Yes, Moderator	Foucault's Penndulum	0	10	10	20
Duke A	UNC B	0	10	10	20
UNC A	UNC C	10	10	10	30
UNC A	UNC C	10	10	10	30
UNC A	UNC C	10	10	10	30
UNC A	UNC C	10	10	10	30
UNC A	UNC C	10	10	10	30
UNC A	UNC C	10	10	10	30
UNC A	UNC C	10	10	10	30
UNC A	UNC C	10	10	10	30
USC A	USC B	0	10	0	10
Florida A	Florida B	0	10	10	20
North Florida	FSU A	0	10	0	10
MIT	Brandeis	10	10	10	30
Brown	Boston College	0	10	0	10
Harvard	Tufts	0	10	10	20
Columbia B	UMD B	10	10	10	30
RIT	Cornell A	10	10	10	30
Rutgers	Cornell B	0	10	10	20
Columbia A	JHU A	10	10	10	30
NYU	Swarthmore	0	10	0	10
Pitt	UMD A	0	10	0	10