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Pedro Brunialti
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40 Answers

Votes Activity Newest
6
Does the path component functor admit a right adjoint?
Feb 8 at 18:13
4
On Cauchy sequence
Apr 29 '20 at 12:06
3
$f: B^2 \rightarrow B^2$ be a continuous map such that $f(x) = x$ for every $x \in S^1$, show $f$ is surjective
Jan 11 at 0:58
3
$M \subset \mathbb{R}^n$ $n-$manifold is an open set or the closure of an open set in $\mathbb{R}^n$
Jan 5 at 17:32
3
Example of “almost metric” topological space
Apr 30 '20 at 19:44
3
Fundamental Group of $(\mathbb{Q},0)$
Apr 15 '20 at 1:21
3
Verify if the following set is open or not
Apr 13 '20 at 0:58
3
Prove that a Curve has no interior points
Feb 10 '20 at 0:47
3
The set of constant functions on $[0,1]$ is closed in $C^{1}([0,1])$ with the sup norm
Feb 5 '20 at 16:21
3
Suppose $\emptyset\neq H\subseteq G$ and if $a, b\in H$, then $a^{-1}b^{-1}\in H$. Prove or disprove that $H \leq G$.
Feb 5 '20 at 0:43
3
In a finite division Ring $a^{|D|} = a$.
Dec 11 '19 at 2:40
3
The symmetric difference is Lebesgue measurable
Oct 24 '19 at 10:45
2
if a function $f$ is a Regular-monomorphism for two functions $g,h :Y\to Z$ and its an epimorphism, then it's an isomorphism.
Feb 11 at 10:10
2
Model categories: Any two solutions to a lifting problem are homotopic
Dec 22 '20 at 19:40
2
Number of elements in a finite $\sigma$-algebra is even
Apr 26 '20 at 17:49
2
Prove or disprove every base of $\mathbb{R} $ as vector space over rational numbers $\mathbb{Q}$ , contain $\mathbb{Q}$
Feb 5 '20 at 20:13
2
Proving the set of irrational numbers in $\mathbb{R}$ has the same cardinality as $\mathbb{R}$
Jan 30 '20 at 1:03
1
Let $E = C[0, 1]$ and $A = \{f \in E \mid f(x) > 0 \text{ for all } 0 \leqslant x \leqslant 1 \}$. Is $A$ open when the norm of $E$ is the L1-norm?
Feb 11 at 11:17
1
Limits in the localization of a category of fibrant objects
Dec 28 '20 at 18:57
1
Relation between path components of two topological spaces with path components of their product.
Aug 19 '20 at 13:29
1
Are Closed Subspaces of Pseudocompact spaces Pseudocompact?
Jul 28 '20 at 13:17
1
The Set of All Vectors (in $\mathbb{R}^n$) whose Components Sum to 1 is Compact
May 1 '20 at 18:16
1
How do I prove this isomorphism $D_{4n}\cong D_{2n}\,\times\, Z_2$ if $n\geq 3$ as an odd integer?
Apr 26 '20 at 18:03
1
Enumerable partition set $C/R$
Apr 14 '20 at 15:57
1
Prove $ \det \nabla f > 0$ for all $x \in G$, but f is not injective with $f(x,y):= (e^x \cos y, e^x \sin y) $
Feb 5 '20 at 15:55
1
Prove $\mathfrak{B}$ is a $\sigma$-field on $\mathfrak{R}$?
Feb 2 '20 at 21:57
1
Tangent space of $M:=f^{-1}(\{(1,4)\})$
Feb 2 '20 at 16:34
1
If $G = \{ A \in GL(3,\mathbb R): A\vec{x} = \vec{x} \}$ where $\vec{x}\in \mathbb R^3$, show $G$ is a subgroup of $GL(3,\mathbb R)$
Jan 31 '20 at 12:50
1
Borel set and Lebesgue
Jan 26 '20 at 21:20
1
Point Derivation other than Directional Derivatives
Dec 19 '19 at 9:23
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