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visits member for 1 year, 8 months
seen Jun 3 at 3:29

May
31
awarded  Mortarboard
Apr
26
answered Can an odd perfect number be divisible by $5313$?
Apr
25
comment Can an odd perfect number be divisible by $5313$?
@Anonymous-agroup I will give Ron Ford the honor. It was his idea, after all.
Apr
25
comment Can an odd perfect number be divisible by $5313$?
@Anonymous-agroup Because the abundancy index of a perfect number must be $2$.
Apr
25
comment Can an odd perfect number be divisible by $5313$?
@RonFord Also note that $$\left(\sum_{k=0}^4 \frac{1}{3^k}\right)\left(\sum_{k=0}^4 \frac{1}{7^k}\right)\left(\sum_{k=0}^4 \frac{1}{11^k}\right)\left(1 + \frac{1}{23}\right) > 2.$$
Apr
25
answered $4 \times 3$ matrix, do rows span span $\mathbb{R}^3$ ? do columns span $\mathbb{R}^4$?
Dec
21
comment Solving $f'''+\frac{n+1}{2}ff''-nf'^2+n=0$ with $n=e^\pi$
Your equation is similar to the Falkner–Skan equation in fluid mechanics. With $n=0$ you obtain the Blasius equation. I would suggest to read some papers about them.
Dec
20
awarded  Yearling
Dec
15
revised Verifying that $2^{44}-1$ is divisible by $89$
improved formatting
Dec
15
suggested suggested edit on Verifying that $2^{44}-1$ is divisible by $89$
Dec
11
revised Can I use my powers for good?
corrected capitalisation and grammar
Dec
10
revised Show that there is no simple group of order $6\cdot{p}^m$ for any prime $p$ and positive integer $m$
improved formatting
Dec
10
suggested suggested edit on Show that there is no simple group of order $6\cdot{p}^m$ for any prime $p$ and positive integer $m$
Dec
10
revised Show that $|G|=1000$ is not simple
improved formatting
Dec
10
suggested suggested edit on Show that $|G|=1000$ is not simple
Dec
10
answered Two questions about order of subgroups
Nov
11
revised In this exercise, we will show that given any integer M, there exist infinitely many pries p such that M
improved formatting
Nov
11
reviewed No Action Needed which is larger number? $\sqrt{7}-\sqrt{6}$ or $\sqrt{6}-\sqrt{5}$
Nov
11
suggested suggested edit on In this exercise, we will show that given any integer M, there exist infinitely many pries p such that M
Nov
10
revised What is a $0\times0$ or $0\times3$ matrix?
added tag and formatted title