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visits member for 3 years, 3 months
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I have a Ph.D. with a minor in mathematics and a major in statistics.


43m
revised Prove that function is inner product
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50m
revised Reference request for undergraduate complex analysis.
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52m
revised Prove that there are infinitely many primes $P_i\equiv1\pmod6$
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53m
revised Prove that there are infinitely many primes $P_i\equiv1\pmod6$
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54m
revised Prove that there are infinitely many primes $P_i\equiv1\pmod6$
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54m
revised Prove that there are infinitely many primes $P_i\equiv1\pmod6$
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58m
revised Prove second derivative of $g$ is proportional to $g^2$
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1h
revised When does $(e^a)^b = e^{ab}$ hold?
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1h
comment Prove second derivative of $g$ is proportional to $g^2$
This is one occasion where working in Leibniz notation might have avoided that confusion. That's what I did in my answer below.
1h
answered Prove second derivative of $g$ is proportional to $g^2$
1h
comment Prove second derivative of $g$ is proportional to $g^2$
$g'(x)$ is not $1/f'(x)$; rather $g'(x)=1/f'(g(x))$. ${}\qquad{}$
5h
comment Uncountable subset $S$ of $(0,1) \implies (0,1)$ has subinterval of limit points of $S$?
Someone down-voted the question. Why? If no comment explains it, then it is more reasonable to assume it's because the down-voter suspects the poster of an affair with his wife than to suspect any reason that makes sense within the appropriate usages of this forum. ${}\qquad{}$
5h
revised Starting positions for open knight tours
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5h
revised Proving certain groups are normal
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5h
comment Why are all non-prime numbers divisible by a prime number?
@JiK : No, that is not the starting point of the question. Maybe you need to read more carefully. It said "Why is it that given that the if a number is not prime, then it is automatically divisible by a prime." Remember I said $N$ would be the smallest number not divisible by any prime. Then either it's divisible by some smaller number or it's not. In the former case it's divisble by a prime factor of such a smaller number (which has a prime factor because it's smaller than the smallest number that doesn't) and in the latter case we also get a contradiction.
10h
revised Reference request for undergraduate complex analysis.
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10h
comment Reference request for undergraduate complex analysis.
You can do a lot without knowing point-set topology, but at some point that becomes useful.
10h
answered Reference request for undergraduate complex analysis.
10h
revised the smallest transfinite ordinal number
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11h
revised Log normal distribution - Where am I wrong?
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