A Blumenthal

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Graduate Student in Math at Courant Institute, NYU.


54 Answers

newest activity votes
6
$\sum a_n$ divergent with $\lim(n a_n)=0$
apr 17 at 15:31
5
delta functions $e^{x}\delta (x)=\delta (x)$
apr 15 at 23:12
4
Estimating rate of blow up of an ODE
jan 31 at 21:50
4
Show $\int_0^1 f(x) dx \int_0^1 \ln f(x) dx \le \int_0^1 f(x) \ln f(x) dx$, when $f \ge 1$
dec 26 at 23:33
3
Prove that there exists $x_n$ such that $0 \leq x_n \leq 1-\frac{1}{n}$ and $f(x_n)=f(x_n+\frac{1}{n})$.
apr 24 at 15:32
3
functional analytic interpretation of the (co)variation and the doob decompostion
feb 14 at 18:35
3
Prove $\dim(W_1 +W_2) =\dim W_1+\dim W_2 - \dim W_1\cap W_2$
feb 3 at 0:38
2
Maximum and Minimum Value of $f(x)$
jun 7 at 7:49
2
Gambling Game: Martingales
may 9 at 1:42
2
Elements in Product Sigma Algebras
may 8 at 22:18
2
Is it always true that $\lim_{x\to\infty} [f(x)+c1]/[g(x)+c2]= \lim_{x\to\infty}f(x)/g(x)$?
apr 24 at 5:25
2
Example for a sequence of functions in $\mathcal{L}^1[0,1]$
apr 4 at 17:09
2
Fiber bundle is compact if base and fiber are
mar 7 at 16:30
2
How do I prove $f:[0,1]^3\rightarrow\mathbb R$ has a minimum and maximum?
feb 13 at 18:55
2
Complex sets: factoring into circle
feb 6 at 23:03
2
Vector field with bounded integral curves
jan 23 at 19:23
2
The extent of chaos
jan 21 at 22:27
2
“The closure of the unit ball of $C^1[0, 1]$ in $C[0, 1]$” and its compactness
jan 18 at 2:29
1
basis-independent isomorphism
3h ago
1
A basic probability doubt on derangment
jun 1 at 10:17
1
Inequalities of expectations
may 8 at 22:53
1
Maximum and Minimum of Determinant
apr 16 at 18:35
1
Function as a convolution product of other two
apr 15 at 23:29
1
Strong operator convergence and adjoint operator
apr 9 at 0:27
1
$\sup\{t_{1}f_{n}(x_{1})+t_{2}f_{n}(x_{2})\mid n\geq n_{0}\}=\sup\{t_{1}f_{n}(x_{1})\mid n\geq n_{0}\}+\sup\{t_{2}f_{n}(x_{2})\mid n\geq n_{0}\} $
apr 3 at 21:23
1
Counterexamples of Arzèla Ascoli theorem for non-obeyed criteria
mar 11 at 21:52
1
Inequality with integral
mar 5 at 19:44
1
From weak and weak star to norm convergence
feb 21 at 20:50
1
A sine integral $\int_0^{\infty} \left(\frac{\sin x }{x }\right)^n\,\mathrm{d}x$
feb 18 at 23:49
1
Almost sure convergence Banach Space valued Random Variable
feb 18 at 5:13
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