topology

[fatboy]

in r2 are the open balls a base for every topology ?

Could you give a numerical example of a base on a topology ?

 

[Euler]

What is r2?

 

[Unco]

2-space.

 

[pka]

“In R<SUP>2</SUP> are the open balls a base for every topology”
Do you know about the discrete topology?
In such questions be careful of words like ‘every’.