184 reputation
5
bio website inf.puc-rio.br/~hgualandi
location Brazil
age 24
visits member for 3 years, 8 months
seen Sep 28 at 20:43

Jan
27
comment Calculate intersection of two ellipses
I don't understand - are the ellipses alligned, sharing a major axis?
Jan
3
comment An example of an easy to understand undecidable problem
@miracle173. Thanks! (btw, if I remember correctly you can add invisible html comments <!-- --> to bypass the edit size limit if you need to fix typos in the future)
Dec
15
comment Prove $2^{1/3}$ is irrational.
You can't prove something starting by assuming what you want to prove.
Dec
5
comment Help with epsilon-delta proof of continuity
eps-delta is traditionally hard because it is one of the first times you encounter a statement with nested exists and for-all quantifiers. The problem is that unless you can specify a specific problem you are having I don~t think anyone here will come up with an explanation that is much better then the one in your textbook.