13h
revised 2x2 matrix multiplication issue
edited tags
14h
revised Number theory: $x^y + 1 = y^x$
edited body
14h
revised Proving $x=2,y=4$ is the only solution to $x^y=y^x$
edited tags
14h
comment Proving $x=2,y=4$ is the only solution to $x^y=y^x$
See this older question: $x^y = y^x$ for integers $x$ and $y$ (Probably a duplicate.) Maybe you can find something interesting in the questions linked to that one, too.
16h
comment How is $x \leq x^2$ false?
Maybe it helps to look at the graphs of the two functions: wolframalpha.com/input/?i=plot+y%3Dx%2C+y%3Dx%5E2
17h
revised A basic root numbers question
edited tags
18h
comment Make teaching a synonym of education
And this one, too: meta.math.stackexchange.com/questions/19037/tag-management-2015/…
19h
revised What is the value of $\lim_{x\to 0}x^x$?
edited body
19h
revised What is the value of $\lim_{x\to 0}x^x$?
edited tags
19h
comment Is a space compact iff it is closed as a subspace of any other space?
I think it is worth mentioning the notion of H-closed space in connection with property 2. IIRC some facts about this class of spaces are mentioned in exercises in Willard's book.
19h
revised Indefinite integration: $\int x^{x^2+1}(2\ln x+1)dx$
more descriptive title
20h
revised Why does the criteria for a good question change with reputation?
edited tags
21h
revised What is the difference of the greatest of the limits $\overline{\lim}_{n\to \infty}$ and the least of the limits $\underline{\lim}_{n\to \infty}$??
edited tags
1d
awarded real-analysis
1d
revised Triangle inscribed in another triangle
edited tags
1d
revised Farthest point on parallelogram lattice
edited tags
1d
revised Digit sum of $n^2$ is 44
edited tags
1d
revised Computing the sum of an infinite series
edited body
1d
answered If $x,y,z \in \Bbb{R}$ such that $x+y+z=4$ and $x^2+y^2+z^2=6$, then show that $x,y,z \in [2/3,2]$.
1d
revised If $x,y,z \in \Bbb{R}$ such that $x+y+z=4$ and $x^2+y^2+z^2=6$, then show that $x,y,z \in [2/3,2]$.
edited tags
1 2 3 4 5