14,126 reputation
33484
bio website sites.google.com/site/rknmodn
location Halifax, Canada
age 32
visits member for 4 years, 5 months
seen Feb 26 at 5:52

This account is no longer in use.


Aug
30
revised Find order of $xy$ provided $x^2=e, y^3=e$ and $yxy=xy^2x$
added 8 characters in body; edited tags; edited title
Aug
29
revised How is $\{ (1/n , 1 + 1/n) \}_{n \geq 1}$ a cover for $(0,2)$?
edited title
Aug
29
comment Problem on directed graph involving $\gcd$
The question for strongly connected digraphs is now here.
Aug
29
comment Problem on directed graph involving $\gcd$
It looks like a counterexample to me. I wonder if this is a homework question; the lecturer might have a surprise when the assignments are returned. (I suppose the theorem would be true if there were no "incoherent" cycles.)
Aug
29
revised Problem on directed graph involving $\gcd$
Added drawing of graph
Aug
29
comment Problem on directed graph involving $\gcd$
What is the value of $p$ if $G$ has no cycles?
Aug
29
comment Calculate the Determinant?
I neatened this answer up a bit, and also corrected the arithmetic.
Aug
29
revised Calculate the Determinant?
Neatened it up; corrected arithmetic.
Aug
28
revised $\frac1a+\frac1b+\frac1c=0 \implies a^2+b^2+c^2=(a+b+c)^2$?
edited tags
Aug
28
revised mean of two consecutive number helps proving both number equals..
edited tags
Aug
28
revised How do I explain the fallacy $\frac00=2$ in this case?
edited tags
Aug
28
revised Critique on a proof by induction that $\sum_{i=1}^n i^2= n(n+1)(2n+1)/6$?
re-titled; re-tagged
Aug
28
revised Simultaneous solution(s) to $a^2+4b^2+4ab=0$ and $a^2+4b^2+32+16a-8b=0$?
re-titled; re-tagged
Aug
28
comment Have you seen this formula for factorial?
This works then: $n!=\prod_{p^a \leq n} p^{\lfloor n/p^a \rfloor}$ where the sum is over all primes $p$ and $a \geq 1$ such that $p^a \leq n$.
Aug
28
comment Have you seen this formula for factorial?
I'm wondering if it can be fixed by using something like "prime power p" or something similar. It's still not right, but a correction term perhaps could be introduced.
Aug
28
comment Have you seen this formula for factorial?
Wrong, as in it's not right. E.g., $4!=24$ and $\prod_{p \leq 4} p^{\lfloor 4/p \rfloor}=2^2 \times 3=12$.
Aug
28
comment Have you seen this formula for factorial?
The first formula is wrong for $n \geq 4$.
Aug
27
revised Area of a region between curves and a point.
edited tags
Aug
27
revised Find an algorithm to compute $(1! \cdot 2! \cdot3!\cdots n! ) \,\%\, x$.
edited tags
Aug
26
reviewed No Action Needed difference between $f(x)=0$ and $y=f(x)$.