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N.B.'s user avatar
N.B.'s user avatar
N.B.
  • Member for 9 years, 6 months
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5 votes
Accepted

Homology of a co-h-space manifold

4 votes
Accepted

Benefits that Higher Topos Theory brought to the discipline

3 votes
Accepted

How can I show that two groups represented by permutation are different?

3 votes
Accepted

Intuition for injectivity of induced homomorphism of covering map (Hatcher Prop 1.31)

3 votes

Why Multiplication of zero by any number is zero?

2 votes
Accepted

Find $U + W$ and $U \cap W$

2 votes

How to introduce a CW structure on RP^n?

2 votes
Accepted

Is this transformation $\mathbb{R}^{n \times n} \ni A \to \det A \in \mathbb{R}$ continuous?

2 votes

Demostration of Prime and Integers number Propositions

2 votes

Counter example to the claim that orbits of $S$ constitute a partition of $S$.

2 votes
Accepted

hTop: Homotopy is compatible with sums

2 votes

Why Bousfield localization preserves homotopy pull-backs?

2 votes

Why is the class of all sets denoted $V$?

2 votes
Accepted

Boundary Homomorphism (2)

2 votes
Accepted

How does the topology of a space describe the closeness of the open subsets of a given set $X$?

2 votes
Accepted

Construction of a biproduct

1 vote

Double coset decomposition

1 vote

Quotient of infinite product of fields which is semi-artinian

1 vote

Show that $\forall n \in \mathbb N^+:G^{(n)}\trianglelefteq G^{(n-1)}$

1 vote
Accepted

Real valued continuous function is the unique difference of two positive functions

1 vote

Prove that $A=\{(x,y)\in\mathbb{R}:(y\neq 0)\vee (x>0)\}$ is connected.

1 vote
Accepted

Is this mapping a homeomorphism?

1 vote

Compact p-adic analytic groups

1 vote
Accepted

If $A$ is an affine space in $\mathbb{R}^n$, is $A-x$ a subspace of $\mathbb{R}^n$ for every $x \in A$?

1 vote

Infinite direct sum of p-adic integers is not p-adic

1 vote
Accepted

nCatLab notation

1 vote

set notation for a set of ordered tuples

1 vote

Union of topological subgroups which intersect only at $0$

1 vote
Accepted

A function T: $T : \Bbb{R^{1}} \to \Bbb{R^{1}} $ is a linear transform if and only if it is written on the form $T(x)=ax+b$?

1 vote

Check the properties of the following operation defined on R