PlanetMath (more info)
 Math for the people, by the people. Sponsor PlanetMath
Encyclopedia | Requests | Forums | Docs | Wiki | Random | RSS  
Login
create new user
name:
pass:
forget your password?
Main Menu
sections
Encyclopædia
Papers
Books
Expositions

meta
Requests (236)
Orphanage
Unclass'd (1)
Unproven (540)
Corrections (46)
Classification

talkback
Polls
Forums
Feedback
Bug Reports

downloads
Snapshots
PM Book

information
News
Docs
Wiki
ChangeLog
TODO List
Copyright
About
References to 'first countable'
1. $\mathcal{C}^r$ topologies by Koro
2. discrete by lalberti
3. equivalent formulations for continuity by matte
4. index of properties of topological spaces by rspuzio
5. limit point by mathcam
6. long line by Dr_Absentius
7. nets and closures of subspaces by azdbacks4234
8. relationship among different kinds of compactness by rm50
9. Sorgenfrey line by yark