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Q&A Meta

Posts by Snoopy‭

33 posts
Score Age
71%
+3 −0
Q&A Fourier transform of an $L^1$ function is uniformly continuous

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
66%
+2 −0
Q&A Fourier transform of an $L^1$ function is uniformly continuous

1 answer  ·  posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Question real-analysis fourier-analysis
66%
+2 −0
Q&A For any real number $m$, $ \left|\sum_{n=1}^{\infty}\frac{m}{n^2+m^2}\right|<\frac{\pi}{2} $

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
66%
+2 −0
Q&A For any real number $m$, $ \left|\sum_{n=1}^{\infty}\frac{m}{n^2+m^2}\right|<\frac{\pi}{2} $

1 answer  ·  posted 3mo ago by Snoopy‭  ·  last activity 3mo ago by Snoopy‭

Question calculus real-analysis
66%
+2 −0
Q&A The derivatives of a function at a boundary point

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
66%
+2 −0
Q&A Using convexity in the proof of Hölder’s inequality

posted 3mo ago by Snoopy‭  ·  edited 15d ago by Snoopy‭

Answer
66%
+2 −0
Q&A Using convexity in the proof of Hölder’s inequality

1 answer  ·  posted 3mo ago by Snoopy‭  ·  last activity 15d ago by Snoopy‭

Question real-analysis
66%
+2 −0
Q&A If both $\lim_{x\to\infty}f(x)$ and $\lim_{x\to\infty}f'(x)$ exist, then $\lim_{x\to\infty}f'(x)=0$.

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
71%
+3 −0
Q&A If both $\lim_{x\to\infty}f(x)$ and $\lim_{x\to\infty}f'(x)$ exist, then $\lim_{x\to\infty}f'(x)=0$.

1 answer  ·  posted 3mo ago by Snoopy‭  ·  last activity 3mo ago by Snoopy‭

Question real-analysis
60%
+1 −0
Q&A What does it mean by saying that $C([0,1])$ is a subset of $L^\infty([0,1])$?

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
60%
+1 −0
Q&A What does it mean by saying that $C([0,1])$ is a subset of $L^\infty([0,1])$?

1 answer  ·  posted 3mo ago by Snoopy‭  ·  last activity 3mo ago by Snoopy‭

Question real-analysis
60%
+1 −0
Q&A $\liminf (a_n+b_n) = \liminf(a_n)+\liminf(b_n)$ provided that $\lim a_n$ exists

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
60%
+1 −0
Q&A $\liminf (a_n+b_n) = \liminf(a_n)+\liminf(b_n)$ provided that $\lim a_n$ exists

1 answer  ·  posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Question real-analysis
60%
+1 −0
Q&A $\sup(A\cdot B) = (\sup A)(\sup B)$ where $A$ and $B$ bounded sets of positive real numbers

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
66%
+2 −0
Q&A $\sup(A\cdot B) = (\sup A)(\sup B)$ where $A$ and $B$ bounded sets of positive real numbers

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
66%
+2 −0
Q&A $\sup(A\cdot B) = (\sup A)(\sup B)$ where $A$ and $B$ bounded sets of positive real numbers

3 answers  ·  posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Question real-analysis supremum-infimum
60%
+1 −0
Q&A Why is $ \int_0^{\infty}\left|\frac{\sin x}{x}\right|\ dx=\infty$?

posted 3mo ago by Snoopy‭  ·  edited 3mo ago by Snoopy‭

Answer
60%
+1 −0
Q&A Why is $ \int_0^{\infty}\left|\frac{\sin x}{x}\right|\ dx=\infty$?

1 answer  ·  posted 3mo ago by Snoopy‭  ·  last activity 3mo ago by Snoopy‭

Question real-analysis improper-integral
50%
+0 −0
Q&A Universal property of quotient spaces

posted 1y ago by Snoopy‭  ·  last activity 1y ago by Snoopy‭

Answer
50%
+0 −0
Q&A Universal property of quotient spaces

2 answers  ·  posted 1y ago by Snoopy‭  ·  last activity 12mo ago by ronno‭

Question topology
71%
+3 −0
Q&A Criterion in terms of the bases for determining whether one topology is finer than another

1 answer  ·  posted 1y ago by Snoopy‭  ·  last activity 1y ago by celtschk‭

Question topology
66%
+2 −0
Q&A Proving $|{\bf R}^{\bf R}|=|2^{\bf R}|$ using the Schroeder-Bernstein Theorem

2 answers  ·  posted 1y ago by Snoopy‭  ·  last activity 1y ago by celtschk‭

Question set-theory
66%
+2 −0
Meta Extra "bar" in the post

1 answer  ·  posted 1y ago by Snoopy‭  ·  edited 1y ago by Snoopy‭

Question discussion bug support
66%
+2 −0
Q&A What did James Stewart mean by "the line integral reduces to an ordinary single integral in this case" ?

posted 1y ago by Snoopy‭  ·  edited 1y ago by Snoopy‭

Answer
66%
+2 −0
Q&A Example of $f:[0,1]\to\mathbf{R}$ with $\lim_{a\to 0^+}\int_a^1f(x)dx=L $ for some real number $L$ but $\int_0^1|f(x)|dx=\infty $

1 answer  ·  posted 1y ago by Snoopy‭  ·  last activity 1y ago by r~~‭

Question real-analysis improper-integral