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Martin Sleziak
Martin Sleziak
8:47 AM
@Glorfindel, would it be appropriate to make a MMO post, to go with Is it time to replace links to the UCDavis arXiv frontend?, to invite other users to join your crusade to fix PlanetMath links? (And, thanks!) — LSpice 8 hours ago
@LSpice Martin Sleziak already started one on Meta.SE, since this affects the entire network. For my script, it's a simple find & replace, the UCDavis case is way more complex. I don't think we want to bump 40 questions at once, so I scheduled the script to run once every three days. — Glorfindel 12 mins ago
SEDE now returns 44 posts with planetmath.org/encyclopedia.
The search for url:"*planetmath.org/encyclopedia*" now returns 41 posts. (Three posts were edited recently by Glorfindel.)
A SEDE query where they are ordered by last activity (i.e., the questions that were bumped most recently are shown first): data.stackexchange.com/mathoverflow/query/1474696/…
The posts where such links was edited away: data.stackexchange.com/mathoverflow/query/1070272/…
Users who often removed such links: data.stackexchange.com/mathoverflow/query/1468213/…
 
 
6 hours later…
Martin Sleziak
Martin Sleziak
2:34 PM
Since neither of them is available in Wayback Machine, they cannot be easily fixed. (Basically one would have to guess the PlanetMath article from the context.)
5
Q: Constructive Proof to Show that Algebraic Numbers are Algebraically Closed

Ashwin DeshpandeEDIT2: After reading some papers, I think the question can best be rephrased as "How can the minimal polynomial for a polynomial with algebraic coefficients be calculated. I have seen papers and textbooks that show that algebraic numbers are algrebraically closed, but I haven't seen a constructi...

real-analysis polynomials fields
> EDIT: Since posting the question, I've read a bit on Galois Theory, and it looks like this problem can be solved, although I'm still trying to figure out exactly how. I've figured out algorithms to find the minimal polynomial for sums and products of algebraic numbers. ...
> ... I still haven't found a algorithm to determine the minimal polynomial for a polynomial with algebraic coefficients although I have found a proof that such a polynomial exists.
0
Q: Relation between cyclotomic character and fundamental character of level

SilamThe question I have is the following: is it true that the $p+1$ exponentiation of the fundamental character of level $2$ gives us the reduction (mod $p$) of the cyclotomic character? For a review of the definitions, see here. Thank you for yours answers.

nt.number-theory algebraic-number-theory galois-representations
> The question I have is the following: is it true that the $p+1$ exponentiation of the fundamental character of level $2$ gives us the reduction (mod $p$) of the cyclotomic character? For a review of the definitions, see here.
 

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