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seen Nov 29 '13 at 23:43

On a much-needed break. For pressing matters, see my contact details below.


A proud contributor to the Crusade of Answers -- more info on meta. Fellow knights include Julian Kuelshammer, rschwieb, anorton, and Shuhao Cao. We are recruiting: just visit the chat room. :)


A mathematics enthusiast caring to help others out. My most knowledgeable areas are logic and category theory. I also know a fair share about measure theory and functional analysis, along with the standard undergraduate curriculum.

When applicable, in the process of answering/helping out, I point people to the community effort ProofWiki which catalogues and rigorously founds proofs in all areas of mathematics.

I am not a native speaker of the English language, but I try to approximate this status; please feel free to point out any errors (perhaps the best way to do so is through chat or e-mail -- see below for the latter).


For those trying to contact me urgently cq. personally, you can direct an email to the following address (all letters lowercase):

my-user-name (at) my-affiliated-site (dot) org


Apr
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awarded  Necromancer
Feb
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awarded  Taxonomist
Jan
9
awarded  Revival
Nov
29
comment Possibilities for changing one $1024$ banknote to banknotes from $\{2^i: i = 0,\ldots,9 \} $
...which leads to the conclusion that it has no place as an answer here.
Nov
29
reviewed No Action Needed How many buckets options are there for putting N balls in the buckets?
Nov
29
reviewed Reviewed Real Analysis: Convex
Nov
29
comment Real Analysis: Convex
Hello, welcome to Maths.SE. Thank you for your question! It is good practice on this site to add a bit of information on the context your question came up in, and to share your own work on it. It's also fine if you state that you're completely lost -- the information is helpful for answerers to gauge their answer on. For more information on asking a good question on this site, see here.
Nov
29
reviewed Reviewed Cardinality of “x−y∈Q”-equivalence class of 1/2 √
Nov
29
comment Possibilities for changing one $1024$ banknote to banknotes from $\{2^i: i = 0,\ldots,9 \} $
Your formula keeps notes from the first and second halves separate; this means you're overcounting by quite a lot.
Nov
29
revised Possibilities for changing one $1024$ banknote to banknotes from $\{2^i: i = 0,\ldots,9 \} $
added 21 characters in body; edited tags; edited title
Nov
29
reviewed Leave Open If a function is smooth is 1 over the function also smooth
Nov
29
reviewed Leave Open How prove this limit $\lim_{n\to\infty}\alpha_{n}=0$
Nov
29
comment bijection from $\mathbb{Q} - \{a\}$ to $\mathbb{Q}$ using elementary functions only?
I'm quite certain that OP was not looking for piecewise functions.
Nov
29
comment Find $\lim_{x\rightarrow 0} \frac{\cos x - 1}{x}$
This answer is circular, using the derivative of cosine.
Nov
29
comment Find $\lim_{x\rightarrow 0} \frac{\cos x - 1}{x}$
MacLaurin/Taylor series are not available, because this limit is used to derive them -- circularity lurks.
Nov
29
reviewed Edit Find $\lim_{x\rightarrow 0} \frac{\cos x - 1}{x}$
Nov
29
revised Find $\lim_{x\rightarrow 0} \frac{\cos x - 1}{x}$
added 18 characters in body
Nov
29
comment bijection from $\mathbb{Q} - \{a\}$ to $\mathbb{Q}$ using elementary functions only?
No need for vague tags. Less so as the tags you used actually are not vague, but precise terms for totally unrelated things.
Nov
29
revised bijection from $\mathbb{Q} - \{a\}$ to $\mathbb{Q}$ using elementary functions only?
deleted 78 characters in body; edited tags
Nov
29
revised How can we define infinitary proofs?
edited body