21,957 reputation
43070
bio website maths.adelaide.edu.au/…
location Adelaide, Australia
age 25
visits member for 1 year, 10 months
seen 10 hours ago

Taking a break for a while.


10h
reviewed Reject suggested edit on Erdös-Straus conjecture
11h
comment Show that the symmetric group $S_p = <\sigma , \tau >$, where $\sigma$ is any transposition and $\tau$ is any p- cycle and p is a prime number.
I'm not sure I understand your question. If $\tau = (a_1\ b_2\ \dots b_p)$ then $\tau^{j}(a_1) = b_{j+1}$; if $b_i = a_2$, then $\tau^{i-1}(a_1) = b_i = a_2$. Is that what you're after?
11h
revised Is it true that if $f'(x) > g'(x)$ then $f(x) >g(x)$?
added 8 characters in body; edited title
11h
reviewed Looks OK Complex Power Series
11h
revised Complex Power Series
added 67 characters in body
11h
answered If $\{\tau_\alpha\}$ is a family of topologies on $X$, show that $\cap \tau_\alpha$ is a topology on $X$. Is $\cup \tau_\alpha$ a topology on $X$?
17h
reviewed Looks OK Is it true that if $f'(x) > g'(x)$ then $f(x) >g(x)$?
18h
comment Is it true that if $f'(x) > g'(x)$ then $f(x) >g(x)$?
You may want to check that again. Consider $x = 0.5$.
18h
reviewed No Action Needed General Solution - Differential Equation
18h
answered Is it true that if $f'(x) > g'(x)$ then $f(x) >g(x)$?
18h
reviewed Approve suggested edit on Solve for $x$, $\tan x +\sec x = 2\cos x$ ; $−∞ < x < ∞$
18h
reviewed Reject suggested edit on Equivalence of sets
19h
reviewed Close Proof of “Normal approximation to the log-normal distribution”
19h
reviewed Close For a normal distribution, find the percentage of data that are between 3.5 standard deviations below the mean and 3 standard deviations above
19h
reviewed Reviewed Some digit summation problems
19h
comment Some digit summation problems
This gives the sum of the integers from $1$ to $1,000,000$, but the question asks for the sum of the digits of the integers from $1$ to $1,000,000$.
19h
revised A combinatorics problem about $n\times n$ square
added 2 characters in body; edited title
19h
reviewed Leave Open Is it normal that a pure math student doesn't know vector analysis?
20h
revised Express $\sin(x) + \sqrt{3}\cos(x)$ in the form $A\sin(x + a)$
deleted 9 characters in body; edited tags; edited title
21h
answered Express $\sin(x) + \sqrt{3}\cos(x)$ in the form $A\sin(x + a)$