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Martin Sleziak
Martin Sleziak
2:07 AM
Not everything should be "praised on math.se" particularly when most of the posts in which you praise concern reputation, ill gotten or otherwise, above and beyond other feats. How about a little bit more focus on curators? — amWhy 3 mins ago
 
 
12 hours later…
Martin Sleziak
Martin Sleziak
2:12 PM
2
Q: Old Links to PlanetMath have Broken

Calvin KhorI recently fixed a broken link to a PlanetMath page, by changing http://planetmath.org/encyclopedia/RotationalInvarianceOfCrossProduct.html to http://planetmath.org/RotationalInvarianceOfCrossProduct. Searching for "PlanetMath" gives 146 hits as of writing. "Planet Math" gives a further 19 hits. ...

discussion hyperlinks
Some related discussion recently on MathOverflow with regards to mass linkrot-correction: meta.mathoverflow.net/questions/5124/… — Asaf Karagila ♦ 19 mins ago
I think that the prudent thing is also to replace http:// with https://, if we're updating stuff. — Asaf Karagila ♦ 18 mins ago
So let us assume that the broken links are the ones with planetmath.org/encyclopedia.
SEDE now returns 184 posts with planetmath.org/encyclopedia.
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/math/query/1474696/…
Interestingly, I only get one comment with such link - maybe I made some mistake when using this query? data.stackexchange.com/meta.math/query/1451220/…
It's not clear how general we should go, e.g. unique readability? — Bill Dubuque May 1 '11 at 0:12
I see - I ran it on meta by mistake. On main I get 110 comments: data.stackexchange.com/math/query/1451220/…
The posts where such links was edited away: data.stackexchange.com/math/query/1070272/…
Users who often removed such links: data.stackexchange.com/math/query/1468213/…
And number of removals per month: data.stackexchange.com/math/query/1468214/…
If we assume that the problematic posts are the ones containing planetmath.org/encyclopedia, I got about 180 posts. You can get them by searching for url:"*planetmath.org/encyclopedia*". I have also posted some SEDE queries here: chat.stackexchange.com/transcript/19138/2022/1/13 — Martin Sleziak 32 secs ago
 
Martin Sleziak
Martin Sleziak
2:43 PM
10
A: How to find and/or change a set of hyperlinks on a site?

Shog9There exists, internally, a search-and-replace tool for rewriting links. It's very simple; if someone changes their entire URL scheme, it's not much help. But for stuff like this, where we can simply cut out one consistent part of each URL and drop in another... It works pretty well. If you need...

> But for stuff like this, where we can simply cut out one consistent part of each URL and drop in another... It works pretty well.
The wording suggests that it should be possible to replace planetmath.org/encyclopedia/ with planetmath.org/.
But it's not clear whether this tool is also able to remove the .html at the end.
The instances where this tool was used (the ones I was able to find) are listed at the end of my feature request: Changing http to https and mobile links for Wikipedia. AFAICT all of them were simply search/replace for two specific strings.]
 
An old man in the sea.
An old man in the sea.
3:43 PM
Hey Martin, how are you?
 
 
1 hour later…
Martin Sleziak
Martin Sleziak
5:06 PM
Some history of broken links here to PlanetMath. I remember fixing some of these back then, after the site reorganized. I'd be glad to help. — hardmath 2 hours ago
19
Q: Links down to PlanetMath.org?

awkwardI have been unable to reach PlanetMath for a couple of days now. I get "This site can't be reached; planetmath.org took too long to respond" in my browswer. Has something happened to the site? If so, this is disturbing, because Mathematics StackExchange answers sometimes link to proofs in Plane...

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14
A: Links down to PlanetMath.org?

hardmathThis site has the best granularity for recent PlanetMath outages that I found so far. There is a GitHub developer issues page for bug reports on the PlanetMath software, but it has been moribund since 2014, possibly because of software revisions in 2015. The Google Groups Planetary Developer f...

 
Martin Sleziak
Martin Sleziak
5:21 PM
Search for url:"*planetmath.org/encyclopedia*" in the whole network returns 259 results.
I have asked this on Meta Stack Exchange: Can the mass-replacement tool also replace and remove? We'll see whether somebody with the knowledge of this tool will respond. — Martin Sleziak 9 mins ago
2
Q: Can the mass-replacement tool also replace and remove?

MartinStack Exchange staff has a tool which can change a bunch of links without bumping the edited posts, see here: How to find and/or change a set of hyperlinks on a site? In the situation that I've seen it was simply a replacement of one string by another - for example, something like replacing all o...

support edits hyperlinks broken-link
1
A: Can the mass-replacement tool also replace and remove?

GlorfindelIt's just a simple Find & Replace tool which (AFAIK) doesn't support wildcards. In that case, that means the operation needs to be performed once for every individual PlanetMath page that is being linked to (because the .html needs to be removed). I'll wait for a staff member to confirm this, but...

 
 
2 hours later…
Martin Sleziak
Martin Sleziak
7:40 PM
Confirmed - the url replace tool that we use is a strict (case-sensitive) find-replace. No wildcards, no regex (by design). — Yaakov Ellis ♦ 7 mins ago
@CalvinKhor My reading of the above answer (by Glorfindel) and comment (by Yaakov Ellis) is the following:
This cannot be done by the tool Stack Exchange has used for non-bumping replacements in the past. (Such as http -> https and some other instances.)
Glorfindel has a tool which automatically edits posts in some intervals - this bumps the posts, but it is automated rather than manual.
I suspect that now, after the confirmation in the comment, Glorfindel might post an answer on Mathematics Meta.
So I'd suggest to wait a bit - and if there's no response from Glorfindel for a day or too, then we might try to ask him whether he would be willing to help with this.
Glorfindel's answer reminded me of this discussion on MathOverflow Meta: Are edits performed by external, non-SE robots allowed?
12
Q: Are edits performed by external, non-SE robots allowed?

Alex M.During my reviewing of Suggested Edits, I have encountered several of them attempted by user @Glorfindel. Upon closer examination, all were performed by a robot written by him and all consisted of replacing inlined "http://" images (which are no longer displayed, being considered insecure) with "...

discussion editing stackexchange suggested-edits
35
A: Are edits performed by external, non-SE robots allowed?

GlorfindelJust to give some background on this project: it's indeed something I'm doing on my own, independent of Stack Exchange. There are more independent 'volunteer' projects around the Stack Exchange network, e.g. Smoke Detector (which I'm also a member of) which automatically flags spam across the net...

 
Martin Sleziak
Martin Sleziak
8:15 PM
Sometimes, the substitution does not work, e.g. here; planetmath.org/Rotate is just the home page. — Glorfindel ♦ 9 mins ago
@Glorfindel I replaced that one with Euclidean transformation - content seems to be the same as in the Wayback Machine snapshot that you provided. In any case, it is good to know that there are some problematic cases - and it is also a reason to be cautious. — Martin 10 secs ago
 

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