meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | 24 | |
| visits | member for | 2 years, 2 months |
| seen | 28 mins ago | |
| stats | profile views | 581 |
|
Apr 18 |
comment |
Radius of the spherical image of a circle The formula with $F$ is fine, but the equation for elements of $\Bbb S^2$ must be: $$x^2+y^2+z^2=1$$ |
|
Apr 17 |
comment |
Radius of the spherical image of a circle Dear @HagenvonEitzen would you like to elaborate it in an answer? I've solved this but my solution involves a lot of computations. |
|
Apr 17 |
revised |
Problem of Separable Metric Space, Isolated points and countable sets deleted 62 characters in body |
|
Apr 16 |
revised |
Problem of Separable Metric Space, Isolated points and countable sets Adding things to make a better corollary. |
|
Apr 16 |
comment |
First-Order Logic vs. Second-Order Logic Perhaps this would like to you. |
|
Apr 16 |
comment |
First-order logic without equality There is no reason for different variables to denote different objects. Different variables are different objects but they can be interpreted as the same object if they are free in a formula. It depends of the model you choose. |
|
Apr 16 |
revised |
Prove that $a \leq 0$ if $a \leq \frac 1 n$ for all $n$ added 5 characters in body |
|
Apr 16 |
revised |
Summations with binomial coefficients:$\sum_{k=0}^{n}\binom{R}{k}\binom{M}{n-k}=\binom{R+M}{n}$ added 1 characters in body |
|
Apr 16 |
revised |
Prove that the set of integer coefficients polynomials is countable edited title |
|
Apr 16 |
revised |
Exercise over numerable sets added 6 characters in body; edited title |
|
Apr 16 |
answered | Problem of Separable Metric Space, Isolated points and countable sets |
|
Apr 15 |
comment |
Problem of Separable Metric Space, Isolated points and countable sets This provides the way (I've seen so far) one prove that a space is not separable, namely, by finding a totally disconnected uncountable subset. |
|
Apr 15 |
revised |
Problem of Separable Metric Space, Isolated points and countable sets deleted 1 characters in body; edited title |
|
Apr 15 |
revised |
Equivalents metrics and closed sets Typo in title and spelling. |
|
Apr 14 |
comment |
Is the product of two measurable subsets of $R^d$ measurable in $R^{2d}$? You can prove this in stages, first intervals, then open sets, then $G_\delta$ sets, then... |
|
Apr 11 |
revised |
Complex Numbers - Locus These tags seems more appropriate. |
|
Apr 10 |
comment |
Does there exist a continuous surjection $f:\mathbb{R} → l^{\infty}$ This is just your prior question with a different title. |
|
Apr 10 |
comment |
Who can solve this ordinary differential equation? Can you please answer Kaster's question? |
|
Apr 10 |
comment |
What is the formula of: $a^{0} + a^{1} + a^{2} + … + a^{n-1} + a^{n}$? Check your algebra. |
|
Apr 10 |
comment |
Distance between point and line in the complex plane To justify my method one can argue that $w'$ is the orthogonal projection of $w$ over $L$. Anyway your approach seems indeed simpler. Thanks again. |
