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visits member for 4 years, 4 months
seen 1 hour ago

 
  two queens
 
 
    mathematics and death
    not cheerful not sad
    guide me through the land
    pat me on my head
 
    they live
    in my one man nation
    i follow them
    to my destination
 
 
wh,
(long ago)



  polynomials over finite Galois field
  spread so evenly across their finite affine space
  i wish for a network of friends
  to count on


wh,
1996-03-05/06



1h
comment Collaboration or acknowledgment?
@JoelDavidHamkins -- you wrote how it is; I wrote how it should be. Borel and Serre in their paper have presented Grothendieck's result, and it was beautiful.
2h
revised A generalized diagonal?
math typos
2h
revised A generalized diagonal?
explanation
2h
answered A generalized diagonal?
21h
comment Sending one curve on a surface to the other by a homeomorphism
(What is your guess?). Check $\ S^1\times S^1.\ $ Then you may ask this q. for each possible surface.
21h
comment Is there a pairing function from countable ordinals to $\mathbb N$?
Reasonable class of ordinals $\ X\ $ perhaps means that there is a reasonable way (algorithm) to assign $\ \mathbb N\ $ to them. Then you get $\ X^2\rightarrow \mathbb N^2\rightarrow \mathbb N$.
1d
comment The Hausdorff quotient of totally disconnected space
Should you have ... different from that closed set after the last phrase ...Hausdorff subset? Let $\ A\subseteq X.\ $ Is, by definition, $\ B\subseteq A\ $ relatively open $\ \Leftarrow:\Rightarrow\ $ there exists open $\ H\ $ such that $\ B=A\cap H\ $ ?
1d
revised Collaboration or acknowledgment?
typo
1d
comment Collaboration or acknowledgment?
I wish the original author of the question would be still listed under his text. Others could be featured, if at all, in a much more discreet way. I wrote about it on Meta but to no effect.
1d
comment Collaboration or acknowledgment?
Classified information. No, Sébastien Palcoux, I was just joking, sorry :-) It is just decoration/format--I am afraid that it's ugly looking. I'd do it nicer if I knew how.
1d
revised Collaboration or acknowledgment?
typo
1d
comment Collaboration or acknowledgment?
please, Sebastian, feel free to remove my addition (totally or partially). I hope though that it is possible to answer the new questions (I can do some of it too :-), even after my extra text were removed.
1d
revised Collaboration or acknowledgment?
cosmetic
1d
revised Collaboration or acknowledgment?
expansion
1d
answered Mean of a vector
1d
comment Collaboration or acknowledgment?
Thank you Sebastian for this opportunity. I'll separate questions+facts from opinions. (I'll need a couple of hours to get to it). It'll be great to involve an historian (amateur or pro). Myself, I don't have this kind of habits to collect references, I only remember mainly my impressions and conclusions (plus multiple moving from one place to another hurt my personal library; but enough of these excuses).
1d
comment Collaboration or acknowledgment?
Another related issue is the role of an Acknowledgment, and the circumstances, when it should or should not appear (even, on many occasions--how sincere it was?).
1d
comment Collaboration or acknowledgment?
@AlexandreEremenko -- these so-called H_L axioms are already abusive. To support Federico, let me mention the OLD practice and moral standard related to "axiom 4" -- it is downright illegal to put a name on a patent (invention) when one is not truly an inventor. This time it's about inventions, not about mathematics, but the moral impact is the same. It's like supposedly Hardy and Littlewood agreed on cheating. The fact that it was supposedly a mutual agreement doesn't make it any better, not at all. Different? -- yes. Better? -- no!
1d
comment Collaboration or acknowledgment?
I felt very uneasy about entering this thread (just like I did or would any other political thread on MO). One additional subtopic (to change the topic :-), which you implicitly have addressed but an explicit formulation would help, is about the situation between coauthors. Once again, it is a loaded topic on occasions.
1d
comment Is the set of numbers $\{ [n^{3/2}] \mid n\text{ an integer}\}$ a basis of order 3?
Are the truncated $\frac 32$ powers a basis of order $4?\ $ Also, I would be even more interested if the set consisting of squares, cubes and $7$ is a basis of order 3? One may ask about similar sums of standard sets too.