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Apr
9
answered Why does closedness and boundedness for $S = \{ v \in V : || v||_{\infty} = 1\}$ imply that $S$ is compact in a finite dimensional vector space $V$?
Mar
27
answered Why the column space of a matrix is useful?
Mar
27
answered Integrals of indicator functions question
Mar
26
answered Let $X$ be a topological space. Prove that for any $x $ in the intersection of all opens sets $=\{x \}$, the space $X$ need not be Hausdorff.
Mar
26
answered Prove $f$ is diagonalizable iff $V=W \oplus Z$ where $W,Z \subseteq V$ are $f$ invariant
Mar
24
answered Are $l^p$ spaces compact?
Mar
24
answered infinite Union of compact sets
Mar
19
answered Compact Projections to $S^1$
Mar
12
answered Countability of certain subset of $\mathbb{R}$
Mar
12
answered what can you conclude about the number of solutions of the linear system Ax = b?
Mar
10
answered A doubt in Probability essentials by Protter
Mar
9
answered Measure of $E$ is the limit of the measure of the open set $\mathcal{O}_n$
Oct
15
answered Question about the closure of a set
Sep
28
answered Prove that $\{x_{n}\} \subseteq A$ a Cauchy sequence $\Rightarrow$ $\{f(x_{n}\}\} \subseteq y$ is a Cauchy sequence.
Sep
12
answered Why is differential geometry called differential geometry?
Sep
7
answered Does $V_1,V_2,V_3$ span $R^4$
May
14
answered Show that if sup{∑|f(a)|}<∞, then {a∈A:f(a) is not zer0} is countable.
May
13
answered Any idea of how to prove this
May
13
answered Motivation of vector bundle of a manifold
May
11
answered Equivalent definitions of vector field