56,737 reputation
566152
bio website thomasoandrews.com
location Cambridge, MA
age 49
visits member for 3 years, 8 months
seen 3 hours ago

"Absent-minded" is what they call you when you are a very smart idiot.


3h
comment A technical relation
You've still got the fraction error in the last line, only on the inequality step, and you also lost the square from $\pi^2$.
3h
comment A technical relation
That first equality on the last line is totally wrong. $\frac{a+b}{c+d}\neq \frac{a}{b}+\frac{c}{d}$.
3h
comment A technical relation
Note, you can restrict the problem to when $\int_0^1 |x(s)|^2ds=1$. That also elminates the case $x(s)=0$ for all $s$...
3h
comment A technical relation
When you say "encountered," what do you mean?
6h
comment Which associative and commutative operations are defined for any commutative ring?
But the case of addition has $b/a$. Obviously, if $ax+b$ is $1-1$ then $ax$ is $1-1$. Still, it is very bad form to write $b/a$ in a general ring, even when $b/a$ has a meaningful value.
6h
reviewed Approve suggested edit on Given $e=\sqrt[y]{x}$ isolate y
7h
comment Which associative and commutative operations are defined for any commutative ring?
In your addendum, how do you know that $(ax+b)*(ay+b)$ is in the range of $\phi$, so that $\phi^{-1}$ is defined there? $/a$ is not well-defined in an arbitrary ring...
7h
comment Conjecture about the powers of 2 in the prime factorizations of the series $a_n = n(n+1)(n+2)$
Note you can greatly reduce your general result by noting that $a_{4n-3},a_{4n-2},a_{4n-1},a_{4n}$ yields $(1,3+v(n),2+v(n),3+v(n))$. This is because $n=k(2m+1)$ in the above, and thus $v(n)=v(k)$.
7h
revised Conjecture about the powers of 2 in the prime factorizations of the series $a_n = n(n+1)(n+2)$
Hope you don't mind reformatting with alignment here
7h
revised Conjecture about the powers of 2 in the prime factorizations of the series $a_n = n(n+1)(n+2)$
added 179 characters in body
7h
comment How to find the value of $\ \lim_{x\to 3^+}\frac{\sqrt{x^2-9}}{x-3}$?
Note that $x\neq 3$ is not enough here.
7h
revised How to find the value of $\ \lim_{x\to 3^+}\frac{\sqrt{x^2-9}}{x-3}$?
added 9 characters in body
7h
comment How to find the value of $\ \lim_{x\to 3^+}\frac{\sqrt{x^2-9}}{x-3}$?
Worth noting: That equality is only true if $x>3$, which is why the question is $x\to 3^+$.
7h
answered Conjecture about the powers of 2 in the prime factorizations of the series $a_n = n(n+1)(n+2)$
8h
comment Conjecture about the powers of 2 in the prime factorizations of the series $a_n = n(n+1)(n+2)$
Probably shouldn't use the word partition here, because that has a very specific meaning. Maybe just "group the elements in sets of four."
9h
revised Topic for a lecture intended for High School students
edited tags
9h
comment Topic for a lecture intended for High School students
Some basic probability might be good. Gambling and games might captivate an otherwise bored group of kids. It would be worth knowing your own mathematical level. However, this is really not a brainstorming site, it is a question and answer site. It is not meant for discussion.
9h
comment Is there a generic, or international, naming of the Wyatt Earp Effect?
According to this link, the name actually originated in a German article: classle.net/book/conditional-probability
11h
comment How to show distributivity in a ring, and what is wrong with my algebra?
The negative is not $-a$, though. $a\oplus(-a)=-1$. You need to find a $b$ so that$a\oplus b=1$...
11h
answered How to show distributivity in a ring, and what is wrong with my algebra?