Mihai.Mehe
  • Member for 2 years, 2 months
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  • Charlotte, NC, United States
0 answers
3 votes
54 views
What is the interpretation of a Kernel $K(x,y)$ in real analysis?
1 answers
2 votes
85 views
Is the operator $T : C[0, 1] → C[0, 1]$ defined by $(T f)(x) = x^2f(x)$ for x ∈ [0, 1] continuous?
2 answers
2 votes
104 views
Weak convergence and $\limsup_{n→∞} \|x_n\| → \|x\|$ implies strong convergence.
1 answers
2 votes
65 views
Show that $(x_n, y_n) → (x, y)$
2 answers
2 votes
38 views
In $l^p$ the map $x\longrightarrow \sum_{n=1}^\infty x_ny_n$ is well-defined.
1 answers
2 votes
136 views
The composition f ◦ · · · ◦ f (n times) bijective => f is bijective, if there is an n for every x.
1 answers
1 votes
27 views
Hermite interpolation for 2 data points and one only one datapoint derivative available
0 answers
1 votes
47 views
Prove that the operator $S = I − A$ is invertible
1 answers
1 votes
49 views
Show that if $C[0,1]$ is equipped with the one-norm $||f||_1 =\int^1_0 |f(t)| dt $ then $δ : C[0, 1] → \Bbb R$ is an unbounded operator
2 answers
1 votes
51 views
Find the norm $||T||$, where $T f(x) = \int^ x_0f(s) ds$ and the norm $||f|| = max_{0≤x≤1}|f(x)|$.
0 answers
1 votes
62 views
Prove that $Df(x) = f'(x)$ is continuous
2 answers
1 votes
60 views
Find $\|A\|$ for the operator $A$
2 answers
1 votes
50 views
Orthonormal $f−\sum_{k=1}^na_k\phi_k$
0 answers
1 votes
83 views
$GL2(\mathbb{R})$ is a subgroup of $A(\mathbb{R}^{2})$
1 answers
0 votes
24 views
Show that $T$ is injective, find the range $R(T)$ of $T$, and find the inverse operator $T^{−1}: R(T) → C[0, 1]$
2 answers
0 votes
104 views
Prove that A is a continuous linear operator mapping $C_2[0, 1]$
0 answers
0 votes
51 views
Hahn-Banach for $\|f\|=1$
0 answers
0 votes
24 views
Is $‖xy‖_{l_1}\geq\sum_k x_ky_k$ true?
0 answers
0 votes
61 views
Prove $ab\leq(1/p)a^p+(1/q)b^q$ using concavity of ln
1 answers
0 votes
40 views
$f(\frac{x}{||x||})=\frac{f(x)}{||x||}$ for a linear functional $f$ on a normed linear space $R$
1 answers
0 votes
47 views
If $x_0$ is sufficiently close to $z$, the sequence ${x_n}$ converges to $z$
1 answers
0 votes
42 views
1 bookmarks
Numerical analysis fixed point iteration on $g(x) =x−af(x)−b(f(x))^2−c(f(x))^3$
1 answers
0 votes
44 views
Numerical analysis condition number
1 answers
0 votes
60 views
Why $g^{m}N=(gN)^{m}=N$?
1 answers
-1 votes
42 views
In a Hilbert space, $\lim_\limits{n\to ∞} |(x, e_n)| = 0$