Stack Exchange
sign up
|
log in
|
Mathematics
Questions
Tags
Tour
Users
Ask Question
Eev
Unregistered
less info
network profile
6
reputation
1
bio
website
location
age
visits
member for
6 months
seen
Dec 17 '12 at 14:34
stats
profile views
2
6
reputation
bio
website
visits
member for
6 months
1
badges
location
seen
Dec 17 '12 at 14:34
summary
answers
questions
tags
badges
favorites
bounties
reputation
activity
1
Question
votes
activity
newest
1
Prove that if $n \in \Bbb N$, $f: I_n \to B$, and $f$ is onto, then $B$ is finite and $|B|\leq n$.
6
Reputation
+5
Prove that if $n \in \Bbb N$, $f: I_n \to B$, and $f$ is onto, then $B$ is finite and $|B|\leq n$.
0
Answers
votes
activity
newest
This user has not
answered
any questions
2
Tags
0
proof-writing
0
elementary-set-theory
1
Account
Mathematics
6
rep
1
1
Badge
recent
class
name
Student
0
Active bounties
active
offered
earned
This user has no active
bounties
0
Votes Cast
This user has not cast any
votes
user feed
Mathematics Stack Exchange works best with JavaScript enabled
network profile
