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ChrisNick92
  • Member for 6 years, 7 months
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  • Athens
12 votes
2 answers
381 views

Connectedness and path connectedness of a set whose intersection with lines is open

7 votes
1 answer
521 views

A simple ring which is not semisimple

5 votes
2 answers
295 views

Is there any subset in $\mathbb{R^2}$ such that...

5 votes
0 answers
211 views

An exercise in Banach Space Theory

3 votes
1 answer
154 views

An exercise with finite subspace of a Banach Space

3 votes
1 answer
209 views

Convergence of the Fourier Series

3 votes
1 answer
307 views

A sufficient condition for minimality in a Topological Dynamic System

3 votes
0 answers
93 views

Description of the limit in von Neumann's mean ergodic theorem via conditional expectations

2 votes
1 answer
2k views

An abelian group $G$ is free abelian if and only if satisfies the projective property

2 votes
1 answer
279 views

An inequality with the characteristic function of a Distribution

2 votes
2 answers
242 views

A new norm defined on X

2 votes
0 answers
84 views

A question about part of the proof of the Central Limit Theorem

2 votes
1 answer
79 views

Determine the angle $\angle DEC$ in a triangle (Euclidean Geometry)

1 vote
1 answer
57 views

An example of a sequence of random variables with certain properties.

1 vote
3 answers
126 views

Is the series $\sum_{n=1}^{\infty} \Bigl(1-\Bigl(1-\frac{1}{n^{1+\epsilon}}\Bigr)^n\Bigr)$ convergent?

1 vote
0 answers
40 views

Evaluate $\mathbb{P}\left(X_n=1\,|\,X_0 = 1\right)$ where $\{X_n\}_{n\in \mathbb{N}_0}$ is a Markov Chain with a given transition matrix $P$.

0 votes
1 answer
199 views

Birkhoff's ergodic theorem in infinite measure case

0 votes
0 answers
103 views

Partial Differential Equation using theory of manifolds

0 votes
0 answers
88 views

Is the Unit ball of $X^{**} $ weak*- sequentially compact?