2,574 reputation
2826
bio website google.com
location Ames
age 33
visits member for 1 year, 6 months
seen Apr 10 at 22:01

I am Patrick.


Feb
2
revised prove that $\mu$ is a measure $\sigma$-finite.
added 17 characters in body; edited title
Feb
1
revised Prove that $\int_0^{\infty} \frac{\sin(2013 x)}{x(\cos x+\cosh x)}dx=\frac{\pi}{4}$
deleted 9 characters in body; edited title
Feb
1
awarded  Strunk & White
Feb
1
revised determinant $s=n+1$
added 15 characters in body; edited title
Feb
1
revised Finding range of a function
added 4 characters in body
Feb
1
revised The figure below shows the graph of a function $f(x)$. How many solutions does the equation $f(f(x)) = 15$ have?
edited title
Feb
1
revised Finding $n$ such that $\frac{3^n}{n!} \leq 10^{-6}$
edited title
Feb
1
revised Computing the minimal polynomial over $\mathbb{Q}(\sqrt{3})$
edited title
Feb
1
revised Positive Continuous functions tending to $0$
edited title
Feb
1
revised Prove $\det(A+I)=1$
added 1 characters in body; edited title
Jan
31
comment What exactly is “approximation”?
Wiki says "An approximation is a representation of something that is not exact, but still close enough to be useful." I guess that "what is useful" depends on the context of your problem.
Jan
31
revised Changing a differential expression into form $f ' (x, y, z)$
edited title
Jan
31
comment An elementary inequality
Seems true. But I can't prove it.
Jan
31
answered Set Theory - proof using set identities
Jan
31
revised Set Theory - proof using set identities
added 5 characters in body
Jan
31
revised Given an $m$ how to find $k$ such that $k m + 1$ is a perfect square
added 2 characters in body; edited title
Jan
31
revised counting problems when to use what
added 21 characters in body
Jan
31
revised Proving that $|\sin z|> |1/z+i|$, $z$ is a complex number
added 2 characters in body; edited title
Jan
31
revised Algorithms for “solving” $\sqrt{2}$
edited title
Jan
31
comment Find the solutions to ${ 450 }^{ { (\sin x) }^{ 3 } }+{ 273 }^{ { (\cos x) }^{ 5 } }=2$
Number of solution is 8, as can be seen from this plot.