Sassatelli Giulio's user avatar
Sassatelli Giulio's user avatar
Sassatelli Giulio's user avatar
Sassatelli Giulio
  • Member for 4 years, 6 months
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6 votes
Accepted

Removing Open Balls $ B(x_i,\frac{1}{2^i}) $ from Real Numbers Centered at Every Rationals x(i) where i is in N

6 votes
Accepted

When does $(X\times Y,\Vert\cdot\Vert)$ have the product topology?

6 votes
Accepted

Which $m \times n$ matrix is the product of an $m \times 0$ and $0 \times n$ matrix?

5 votes
Accepted

Are convex polytopes closed in arbitrary metric spaces?

4 votes
Accepted

Does Cantor’s theorem rely on the Empty Set being in the power set of a set?

2 votes

confusion regarding infinite cartesian product

2 votes
Accepted

majorization of polynomials over the unit circle

1 vote
Accepted

If $E,F\subseteq X$ are homeomorphic set then is $E$ open/closed if $F$ is open/closed?

1 vote

Given matrix $A \in \Bbb R^{n \times n}$ such that $A^2=-I$, find $\det(A)$

1 vote
Accepted

Is sup of the solutions in $t$ to $\int_{B(x,t)}f\,dV=t^n$ Borel measurable?

1 vote

I just built a non-measurable set without the axiom of choice, where is my mistake?

1 vote
Accepted

Linear transformation of simply connected set: is it simply connected?

1 vote
Accepted

Does partial differentiation preserve continuity in another variable?