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Stefan Kohl's user avatar
Stefan Kohl's user avatar
Stefan Kohl
Moderator
  • Member for 12 years, 1 month
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revised
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revised
Conceptual reason why the sign of a permutation is well-defined?
Appended the text of the OP's second answer.
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Maximal symmetries of complete metrics on manifolds
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Is a topology determined by its convergent sequences?
@PeteL.Clark It happens that the link math.uga.edu/~pete/convergence.pdf got broken in the meantime. -- Would it be possible to fix it?
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Nature of function as $x\rightarrow\infty$
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Weak convergence in $W^{1,p}_0$
Fixed broken link.
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Is St. Petersburg a good place for the 2022 Int. Congress of Mathematicians
@DeaneYang While there is no perfect location, certainly a good approximation are small neutral countries (such as e.g. Switzerland or Austria) which were not involved in war in the past decades and which do not threaten other countries by military means. And yes, I also think funding should be by all IMU members -- already to avoid that only big or rich countries can host an ICM, or that commercial / PR considerations play a too big role.
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Is St. Petersburg a good place for the 2022 Int. Congress of Mathematicians
I'd even go that far to say that such global event as an ICM should ideally take place in a location where nobody -- regardless from where in the world -- has the feeling to be in enemy's country, as far as this can realistically be achieved. But an ICM in St Petersburg this year would feel to me like an ICM in Munich in 1938.
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First uses of the term "crackpottery" in mathematics
@ManfredWeis The term exists quite literally in the same meaning also in (very colloquial!) German language -- einen Sprung in der Schüssel haben.
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How to promote a blog?
Removed section with links criticised as self-promotion by a flagger. (One of the links also got broken in the meantime.)
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Modern results that are widely known, yet which at the time were ignored, not accepted or criticized
@MargaretFriedland Interesting ... ! -- I heard people mentioning this as such example. -- But I am not working on the topic.
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Mathematical journals that accept long papers (up to 100 pages)
Is it original research or rather an expository paper? -- I'd guess that if it is original research, a 100-pages-paper needs to be pretty strong / important to find readers (or if it is not, it needs to be at least written very well)(?)
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Local discriminant variety
appended answer 414879 as supplemental
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Riemann's formula for the metric in a normal neighborhood
Allowing minor edits which do not bump the post to the front page is indeed an issue which has been discussed again ańd again since years (cf. e.g. here and here ), but always declined in order to prevent vandalism remaining unnoticed, Besides that -- does the preview work for you? -- That should show reasonably well how the post will look like before actually posting it.
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Riemann's formula for the metric in a normal neighborhood
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On convex planar regions that can be cut into only a specified number of mutually congruent and connected pieces
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How do pure mathematicians assess whether their research ambitions can be realistically achieved?
Sometimes it is a good idea not to focus too much on following a pre-planned research program, but to be always open to whatever other findings one may make along the way. -- It may happen that one isn't successful in answering any of the questions one originally planned to answer, but one nevertheless finds something else which is not less interesting.
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Discriminant of $\alpha P(u) + (z-u) P'(u)$
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