2,415 reputation
932
bio website
location Canada
age 32
visits member for 1 year, 10 months
seen 20 hours ago

I hold a diploma in Network Administration (along with many industry certifications) and am currently studying Computer Science and Pure Math in University.


Feb
20
awarded  Notable Question
Feb
12
awarded  Popular Question
Feb
10
awarded  Notable Question
Feb
2
accepted How to tell if I am double counting in a combinatorics problem?
Feb
2
asked How to tell if I am double counting in a combinatorics problem?
Jan
30
revised Help with the algebra in for this number theory proof?
Formatted with tex
Jan
29
awarded  Popular Question
Jan
26
awarded  Notable Question
Jan
24
awarded  Popular Question
Dec
18
comment How does the triangle inequality work for $|x-y|$?
Yes, that's what I ended up finding. Never occured to me
Dec
17
accepted How does the triangle inequality work for $|x-y|$?
Dec
17
comment How does the triangle inequality work for $|x-y|$?
Nevermind - I found a proof that shows the inequality using $|x+y|$
Dec
17
comment How does the triangle inequality work for $|x-y|$?
But my question, though, is how $||x|-|y||\leq|x+y|$? My textbook says (without proving) that $||x|-|y||\leq|x+y|\leq |x|+|y|$.
Dec
17
comment How does the triangle inequality work for $|x-y|$?
I have here that $||x|-|y||\leq|x+y|\leq |x|+|y|$... I was able to find several proofs of the "reverse triangle inequality", but they all start off with $|x-y|$ instead of $|x+y|$ like in the upper and lower bounds given. How does this proof translate from $|x|-|y|\leq |x-y|$ to $||x|-|y||\leq |x+y|$?
Dec
17
asked How does the triangle inequality work for $|x-y|$?
Nov
25
awarded  Popular Question
Nov
6
asked How to conclusively determine the interior of a set
Nov
5
awarded  Nice Question
Nov
4
asked Convert a WFF to Clausal Form
Nov
4
accepted Finding the matrix of a linear transformation relative to two non-standard bases