Ubaldo Tiberi
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4 votes
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Is [0,1] in R totally bounded?
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2 votes
100 views
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Shouldn't a random variable be defined from sets to sets and why the probability density is a distribution?
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1 votes
75 views
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Given a function $x(t)$, what are the conditions that secure the existence of a $f$ such that $\dot x = f(x)$†
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1 votes
49 views
Can an isomorphism between two finite-dimensional linear spaces be always represented by a matrix?
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1 votes
39 views
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Yet another "finding closure of a set" problem
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0 votes
84 views
Bound of polynomial of degree n with Euclidean norms
1 answers
0 votes
46 views
An example of a sequence in $l_4$ but not in $l_3$?
1 answers
0 votes
14 views
Bases for two linear subspaces in the sets of all the functions $f:\mathbb{R} \to \mathbb{R}$ and $f:\mathbb{R}^n \to \mathbb{R}^n$, respectively.
1 answers
0 votes
110 views
Metric spaces exercise: draw a ball, check the convergence of a sequence, find the interior of a set and the dense subsets.
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0 votes
120 views
Ball shape on different metric spaces and interior set