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Nov
2
revised Representation of an Abelian Lie algebra
english
Oct
30
comment Prove the function $f(x) = (a*x)^{-1}$ is bijective
The inverse of $(a*x)^{-1}$ is $a*x$.
Oct
30
answered Prove the function $f(x) = (a*x)^{-1}$ is bijective
Oct
30
comment Proving a subset of a metric space is bounded
You should mention what is the definition of bounded, since what you are asked to prove could be a definition.
Oct
26
comment The mathematics underlying Rubik's games
See math.harvard.edu/~jjchen/docs/…
Oct
26
revised Help with proving property of Rubik's cube.
added 67 characters in body
Oct
26
answered Help with proving property of Rubik's cube.
Oct
26
comment Sobolev embedding theorem, inequalities
Maybe you can take $p=+\infty$ if $n<3$...
Oct
26
revised Sobolev embedding theorem, inequalities
added 23 characters in body
Oct
26
revised Sobolev embedding theorem, inequalities
added 23 characters in body
Oct
26
answered Sobolev embedding theorem, inequalities
Oct
26
comment Sobolev embedding theorem, inequalities
When you write $d$ you mean $n$?
Oct
26
answered Pointwise, Uniform convergence on [a, ∞)
Oct
26
answered How to show a piecewise function is continuous on a subinterval
Oct
21
revised $f: \mathbb{R}\rightarrow\mathbb{R}^2$ where $\overline{f(\mathbb{R})}\neq f(\mathbb{R})$
added 6 characters in body
Oct
21
answered $f: \mathbb{R}\rightarrow\mathbb{R}^2$ where $\overline{f(\mathbb{R})}\neq f(\mathbb{R})$
Oct
21
revised partial differential,stationary point and classify the point
added 186 characters in body
Oct
21
answered partial differential,stationary point and classify the point
Oct
21
revised partial differential,stationary point and classify the point
latex
Oct
20
revised why is there no order in metric spaces?
added 6 characters in body