2,619 reputation
2827
bio website google.com
location Ames
age 33
visits member for 1 year, 11 months
seen 2 days ago

I am Patrick.


Feb
3
revised Find basis of polynomial vector having $p(0)=0$
added 4 characters in body; edited title
Feb
3
revised Total Permutation of graph with $n$ vertex?
added 21 characters in body; edited title
Feb
3
revised hard parametrization problem
added 35 characters in body
Feb
2
revised Find $\lim_{x\to 0^+} \ln x\cdot \ln(1-x)$
added 6 characters in body; edited title
Feb
2
revised Heat Equation $1D$ with forcing term
added 8 characters in body; edited title
Feb
2
revised Evaluating the definite integral ${\int_{-4}^{4}} (10x^{9} + 7x^{5}) dx$
added 2 characters in body; edited title
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