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May
12
revised Help to understand material implication
Minor clarification
May
12
answered Help to understand material implication
May
12
comment Edge of factoring technology?
@noonand: No problem, I appreciate the comment. :)
May
11
comment Edge of factoring technology?
Blah, sorry. I had "Schorr" originally (probably confused with Claus Schnorr, another cryptographer) and I "fixed" the spelling from "Schorr" to "Schor". Thanks to J.M.
May
11
answered Edge of factoring technology?
May
10
answered Find a number $b$ such that $a\cdot b\equiv 1\mod m$
May
9
answered Your favourite maths puzzles
May
9
comment Your favourite maths puzzles
I think this problem is a bit too well-known. en.wikipedia.org/wiki/Fair_coin#Fair_results_from_a_biased_coin
May
8
awarded  Enlightened
May
8
awarded  Nice Answer
May
8
comment Where did the word “logarithm” come from?
@Qiaochu: Note that I was requiring that the word be accepted as "elevated" to lowercase usage in order to sufficiently divorce it from its origin as a proper noun. Both "algorithm" and (often) "abelian" enjoy this status.
May
8
accepted Need a result of Euler that is simple enough for a child to understand
May
8
revised Where did the word “logarithm” come from?
added historical note
May
8
answered Where did the word “logarithm” come from?
May
7
answered Can this number theory MCQ be solved in 4 minutes?
May
7
comment Factorize $x^3-3x+2$
@cardano: since Jim didn't answer, I will: often you can notice small roots just from examination. For example, any polynomial with no constant term will have 0 as a root. If the sum of the coefficients sum to zero (as they do in your question) then 1 is a root. It's usually worth trying -1 as well. Most "real" polynomials won't have nice roots like this, but contrived homework problems and textbook problems will.
May
6
comment Infinity = -1 paradox
A similarly wrong (but simpler) proof would go like this: $\infty+1$ is still $\infty$ since you can't make it any larger. But then we have $\infty = \infty+1$ and we subtract infinity from both sides proving $0=1$.
May
6
awarded  Nice Answer
May
5
comment Factorize $x^3-3x+2$
I don't understand the animosity toward the asker here. What is wrong with asking how to factorize a polynomial?
May
4
answered Recommended Math knowledge for programming