319 reputation
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age 19
visits member for 1 year, 9 months
seen Jul 14 at 4:38

Nov
19
asked Proving a vector space over itself have no subspaces
Nov
14
accepted Proving the sup of $\{\frac{n-m}{n+m}|n,m\in \mathbb{N}, m<n\}$
Nov
14
comment Proving the sup of $\{\frac{n-m}{n+m}|n,m\in \mathbb{N}, m<n\}$
Though I see how I can use it in this question, appereantly it wasn't necessery. Thanks for this neat idea though, I'm sure it will be useful for me in the future.
Nov
14
comment Proving the sup of $\{\frac{n-m}{n+m}|n,m\in \mathbb{N}, m<n\}$
oh yeah, I see... Damn it's annoying being stuck on a question because you accidently turned a sign around... Thanks!
Nov
14
asked Proving the sup of $\{\frac{n-m}{n+m}|n,m\in \mathbb{N}, m<n\}$
Nov
12
awarded  Commentator
Nov
7
accepted Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable
Nov
7
revised Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable
added 300 characters in body
Nov
7
comment Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable
actually we didn't talk at all about of $\mathbb{N}^n$ like that. unless I missed a lot more then I can remember
Nov
7
comment Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable
I tried looking at the private case of $|f^{-1}(\{1\})|=1$, But I'm not exactly sure how to write it. I understand that exists a function $g$ that maps every $n\in\mathbb{N}$ to the function for which $f(n)=1$, but how do I write it formally?
Nov
6
comment Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable
Yep, these are the functions I try to prove there are countably infinite number of.
Nov
6
revised Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable
added 417 characters in body
Nov
6
asked Proving a set of functions from $\mathbb{N}$ to $\{1,0\}$ is countable
Nov
4
accepted proving a simple function is bijective
Nov
4
comment proving a simple function is bijective
If you'll look at the edit you'll see that's exactly where I was when asking in the first place. Well, it's my fault for trying to post questions while on a bus. I got my answer I think , ty...
Nov
4
comment proving a simple function is bijective
how do I explain this function is infact bijective?
Nov
4
revised proving a simple function is bijective
expanded the question to what it was originally supposed to be
Nov
4
asked proving a simple function is bijective
Nov
3
accepted Using the AM-GM inequality on 2 elements to deduce it's true for 4?
Nov
3
comment Using the AM-GM inequality on 2 elements to deduce it's true for 4?
Got it, thanks...