13,828 reputation
33078
bio website sites.google.com/site/rknmodn
location Halifax, Canada
age 32
visits member for 4 years, 2 months
seen Feb 26 at 5:52

This account is no longer in use.


Oct
20
answered Number of ways to write n as a sum of k nonnegative integers
Oct
20
revised In how many ways can I have $1.50 using exactly 50 Coins?
Missed the "exactly 50 coins" restriction.
Oct
20
answered In how many ways can I have $1.50 using exactly 50 Coins?
Oct
20
comment Pattern matching questions
Are you sure this has something to do with maths, and isn't some cop-out such as "how to dance the Timewarp"?
Oct
20
reviewed Leave Open toggle boolean and more
Oct
20
comment Evaluating $\sum\limits_{n=0}^{20} \frac{(-1)^{n}2^{n+1}}{3^{n}},$
I'm disinclined to upvote this because it contains no words. Most importantly, there's no text to highlight the use of the geometric series.
Oct
20
comment Number of binary numbers with two consecutive zeros
That's why I often give computational answers -- to encourage people to become familiar with GAP's features (or other computer algebra systems; but I prefer GAP since it's free and open source).
Oct
20
reviewed Leave Open Usage of finite fields or Galois fields in real world
Oct
20
reviewed Reviewed How to calculate a confidence interval for a binomial, given a specific prior
Oct
20
reviewed Reviewed How do I prove $x \vee \neg x$ in Hilbert system?
Oct
20
comment How do I prove $x \vee \neg x$ in Hilbert system?
Ow! My eyes hurt!
Oct
20
reviewed Reviewed Interpretation of condition on positive random variable
Oct
20
reviewed Reviewed number of n-vertex graphs degree $\leq$m
Oct
20
answered Number of binary numbers with two consecutive zeros
Oct
20
comment Question about units and area of a circle?
Where's this question from? (Looks word-for-word like this question at Yahoo! Answers.) What progress have you made?
Oct
20
revised Seeking a proof of $\sum_{d|n}\phi(\frac{n}{d})a^d\equiv 0 \mod{n}$, where $\phi$ is the Euler Totient Function.
Re-titled; re-tagged
Oct
19
reviewed Leave Open Solving a nonhomogenous differential equation with RHS as $f(x,y)$
Oct
19
comment Solving a nonhomogenous differential equation with RHS as $f(x,y)$
Why? There's nothing wrong with question--it's well-written, polite and shows effort. If only every question here was like this one.
Oct
19
comment $\sum_{k=1}^n a_k^3 = \left(\sum_{k=1}^n a_k \right)^2$
Yes, there's some in the list above, such as [ 3, 3, 3, 3, 6 ] and [ 4, 4, 4, 5, 5, 5, 9 ].
Oct
19
asked For which positive integers n does there exist a prime whose digits sum to n?