bio  website  people.math.osu.edu/edgar.2 

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visits  member for  5 years, 7 months 
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8m

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A book for problems in Functional Analysis
I looked for books at Amazon, and found that "functional analysis" is a topic in psychology, with more books than the samename topic in mathematics... 
15m

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Do nonnormal states exist in the Solovay model?
Perhaps we need a definition or reference for: state, normal state. 
May 22 
answered  Slightly weakened / altered concepts of a field 
May 21 
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I cannot solve this question! HELP
See "help" above to discover what questions are appropriate here. 
May 21 
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Differential Topology over $\mathbb{Q}$
For example, an uncountable disjoint union of copies of $\mathbb Q^n$. So the requirement may as well be that the whole space is countable (as Simon assumes). 
May 21 
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Differential Topology over $\mathbb{Q}$
Also, we need a definition of "rational manifold". Without paracompactness you could have some sort of "long line" not of the same cardinal as the "short line" $\mathbb Q$. 
May 21 
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Differential Topology over $\mathbb{Q}$
So "differentiable" means differentiable at each point of the domain? So the differential may vary from point to point? And need not depend continuously on the point? 
May 20 
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Find the expansion of the exact solution (beyond Taylor)
@Carlo: He says limit $S \ll 1$ ... so you claim that is a mistake and he intends $S \to \infty$ instead? 
May 20 
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Are there examples of functions in $L_1$ and $L_\infty$ whose Fourier series divergent (“weakly”)?
@user228494: Uniform boundedness principle. An interesting method to show existence. But your question asks for "some examples" and UBP is not the way to produce explicit examples. 
May 18 
answered  When Banach indicatrix is measurable? 
May 18 
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$L_{\infty}$norm of a $\delta(t)$“function”?
If you take a sequence $\phi_n$ of functions that converges to $\delta$, then $\\phi_n\_\infty \to +\infty$. Another reason that (as nate said) $\delta \not\in L_\infty$. 
May 8 
revised 
What is a “generalized zeta function”?
added 72 characters in body 
May 8 
answered  What is a “generalized zeta function”? 
May 8 
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Are measurable homomorphisms $ (\Bbb{C},+) \to (\Bbb{C},+) $ or $ (\Bbb{C},+) \to (\Bbb{C},*) $ continuous, and do they admit an explicit description?
To avoid confusion, instead of "Baire measurable" we can say "a map with the property of Baire". 
May 8 
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Are measurable homomorphisms $ (\Bbb{C},+) \to (\Bbb{C},+) $ or $ (\Bbb{C},+) \to (\Bbb{C},*) $ continuous, and do they admit an explicit description?
"Measurable", with no qualification, means: inverse images of an open set is a Lebesgue measurable set. Did I guess what you mean? 
May 7 
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Transcendence of solutions of $\sum_{i=1}^n a_i b_i^x = 1$
Of course the solution of $$ \left(\frac{1}{3}\right)^x + \left(\frac{3}{4}\right)^x = 2 $$ is rational, and the solution of $$ \left(\frac{1}{3}\right)^x + \left(\frac{3}{4}\right)^x = \frac{13}{12} $$ is rational. And of course there are many more like this. So any proof that your number is transcendental seems unlikely to me. See? I can do "seems to me" statements, too. 
May 6 
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Is there a simple description of this group?
title changed.. 
May 6 
revised 
Is there a simple description of this group?
edited title 
May 4 
awarded  Nice Answer 
May 2 
awarded  Nice Answer 