701 reputation
617
bio website
location Reno, NV
age 23
visits member for 3 years, 4 months
seen Jan 7 at 1:57

I'm a math/programming teacher and freelance programmer. My first language was Scheme, and I have a major soft spot for functional programming. I read SICP every year and do all of the exercises (so I'm pretty good at hw-type problems.)


Mar
25
comment Proving that $\sqrt{2}+\sqrt{3}$ is irrational
This is clever and very simple. I barely missed this idea. I was trying to do stuff with conjugates, but didn't quite connect the dots.
Mar
25
accepted Proving that $\sqrt{2}+\sqrt{3}$ is irrational
Mar
25
revised Proving that $\sqrt{2}+\sqrt{3}$ is irrational
added 1 characters in body
Mar
25
comment Proving that $\sqrt{2}+\sqrt{3}$ is irrational
Oddly, those didn't come up when I searched. I saw those after posting and was going to close, but then people started answering. Still, it's been helpful.
Mar
25
asked Proving that $\sqrt{2}+\sqrt{3}$ is irrational
Mar
18
comment Proof that $\binom{ n}{k} \in \mathbb N$
That's probably my biggest complaint about the text. For the most part, the exercises are very illuminating. Every once in a while though, I get a problem like this that really makes me wonder what he's trying to show here.
Mar
18
accepted Proof that $\binom{ n}{k} \in \mathbb N$
Mar
18
comment Proof that $\binom{ n}{k} \in \mathbb N$
Most of the proof exercises in Spivak seem to follow directly from the text. I had to incorporate quite a bit of outside knowledge to do this one, which makes me feel like I'm missing the point...
Mar
18
asked Proof that $\binom{ n}{k} \in \mathbb N$
Mar
16
comment Help with this inequality.
Nvm, I figured it out.
Mar
16
accepted Help with this inequality.
Mar
16
accepted Help proving a little theorem about inequalities
Mar
16
accepted Trying to prove this statement about inequalities
Mar
16
comment Help with this inequality.
I caught the triangle inequality, and I'm clear on the cross multiplication... I just don't know what's happening between steps two and three. To be more specific, where is $0<\frac{|y_0|}{2}<|y|$ coming from? Sorry, I'm a little slow.
Mar
16
comment Help with this inequality.
I lost you after the second arrow. Do you think you could elaborate further on that step?
Mar
16
asked Help with this inequality.
Mar
15
revised Trying to prove this statement about inequalities
LaTex added
Mar
15
suggested approved edit on Trying to prove this statement about inequalities
Mar
15
asked Trying to prove this statement about inequalities
Mar
12
asked Help proving a little theorem about inequalities