Reputation
14,629
Top tag
Next privilege 15,000 Rep.
Protect questions
Badges
3 36 87
Newest
 Nice Answer
Impact
~442k people reached

May
9
awarded  Popular Question
Mar
9
awarded  Necromancer
Dec
27
awarded  Nice Answer
Dec
16
awarded  Revival
Nov
20
awarded  Revival
Nov
16
awarded  Popular Question
Nov
11
awarded  Nice Answer
Nov
5
awarded  Revival
Oct
11
comment Perfect numbers less than 10 000
I'm not sure in Maple, but in GAP they can be found using Filtered([1..9999],i->Sum(DivisorsInt(i))=2*i); which returns [ 6, 28, 496, 8128 ]. It's just brute force computation; nothing intelligent.
Oct
10
comment New hourly rate after a pay raise
Does one really get 3 dollars for answering this question? I find that hard to believe. But, if it were true, by crowdsourcing, we don't even need to know any maths to make money. We can just copy/paste the questions here, and copy/paste the answers back for profit. Nice!
Sep
24
comment Re-write $1 \cdot x$ to $x$.
A large chunk of Adriano's proof (and the Prover9 proof) amounts to showing that $(x^{-1})^{-1}=x$. If we can assume this: $$1x=(xx^{-1})x=x(x^{-1}x)=x(x^{-1}(x^{-1})^{-1})=x1=x.$$
Sep
23
revised Prove that $\sum_{k=0}^r {m \choose k} {n \choose r-k} = {m+n \choose r}$
edited tags
Sep
23
revised How to calculate no. of binary strings containg substring “00”?
edited tags
Sep
23
revised How to solve this using using stirling approx?
edited tags
Sep
21
answered Re-write $1 \cdot x$ to $x$.
Sep
15
comment Show Continuity Using Epsilon Delta Definiton
What happens if you attempt to do what it asks?
Sep
12
answered Is the any application of vector that is only specific to biology or chemistry?
Sep
12
revised “Monotone Convergence Theorem” $\implies$ “least upper bound property”
edited tags
Sep
12
revised Binomial and series with 2 coefficients
Fixed error
Sep
12
reviewed Leave Open A bijection of Cartesian products