Notices by Tommaths (he/him) (teakayb@mathstodon.xyz)

@vicgrinberg @TalesFromTheArmchair

Thanks! So lots of mass _is_ the only feasible route for black hole formation?

@TalesFromTheArmchair @vicgrinberg

Black holes form when something provides enough energy to overcome the pressure that stops things collapsing in on themselves. One of the things that can provide enough energy is gravity, if you have enough of it, and that gravity comes from getting an enormous amount of matter together in one place.

Another way of overcoming that pressure is by smacking things together _really_ hard. If you could smack two peas together hard enough that the matter that made those peas ended up inside their own event horizon, you'd have made a tiny black hole.

There are some very high-energy things whizzing about the universe. If they hit the right things in the right way, they could form tiny black holes.

Regarding the not popping back out again: once that stuff is inside its own event horizon, there's no popping out: nothing crosses the boundary the other way.

@vicgrinberg @TalesFromTheArmchair
Cool. Are the energies required feasible from, say, a future particle accelerator? Or is that asking too much of human technology?

@goatsarah @vicgrinberg
I was trying to work out how to word this idea; I think you've done a really good job of it!

Following yesterday's wasp invasion at Big #MathsJam it's been announced that today there's an invasion of Bs.

Following Karen Harris' excellent Big #MathsJam talk about maths in film, I thought some people might be interested in this "Maths in Movies" list I've started to curate on Letterboxd: https://boxd.it/yzCf6

Any further recommendations would be very enthusiastically received, especially if they were accompanied by a brief synopsis and critique.

#MuseumEducators are a bit thin on the ground in the Fediverse and I'd really like to collect some more!

So do you work in a #museum, #gallery, #archive, #library or other #heritage sector organisation in a role which focuses on #learning and #education? Please say hi, especially if you're in the UK!

If not, do you know anybody who does? Please introduce us!

If neither of the above fit then a boost would still be very much appreciated.

Note: When I post things like this I tend to get helpful replies about following #tags: I know this, and I do! I'm looking for people rather than posts: there aren't many of either and the relevant #tags are just so much tumbleweed so far. There _must_ be museum educators out there somewhere (but they're not posting about museum education things because they haven't found anyone else who cares...): I'm trying to build that community.

#GLAM #GLAMEd

I'm going to come in from what I think is left-field with Jurassic Park. It's alluded to in the movie, but the novel is an allegory of chaos theory, a main character who's a rockstar mathematician who isn't your classic tweed-wearing, socially inept movie mathematician. Even the chapter headings are successive iterations of a fractal rather than the standard sequence of integers.

Please recommend #books about #maths that *aren't* about teaching it.

I'm looking for books that someone might sit and read for pleasure rather than for academic reasons (so not really textbooks, but I guess there might be some really compelling textbooks out there). Fact or fiction. Feel free to define "about maths" however you like (there may be points for really inventive interpretations). They might only be loosely about maths, but I'll set the criterion that someone who thinks they're not into maths would recognise it as maths.

Go!

I follow a great selection of #maths #teachers on twitter, but most are either not jumping ship or they're going to BlueSky or (yuck) Threads.

I lament their loss from my timeline and feel that if I were to find some more excellent people here I might be able to coax a few over, so...

If you're a teacher...
... especially of maths...
... and especially in the #UK...

I'd love it if you'd make yourself known.

[And if you're not any of these things I'd love it if you'd...
a) Let me know what we _do_ have in common (if you're interested in connecting with me)
b) Boost me in case you have some people who are those things in your networks]

A quick heads-up that Cineworld cinemas will be showing all 9 Skywalker saga movies + Rogue One over ten consecutive Sundays starting Aug. 25th...

... and it's only £5 a ticket.

I will be seeing most of them in MK, if anyone wants to join me.

I'm so excited!

If a maths-ed genie made me choose between (A) making all maths teachers super-exciting and (B) making sure every child had a parent who demonstrated genuinely & consistently positive attitudes to maths it'd be B.

That's where the biggest problem with maths ed is BY FAR.

"I can't draw" is almost (but not quite) as common a misconception as "I can't do #maths". Prove yourself wrong for one of these at Olivia's free drop-in #drawing workshop at the National Portrait Gallery (London) on 21st June:

https://www.npg.org.uk/whatson/event-root/june/drop-in-drawing-21062024

@feditips
It's happened again: @museumed is no longer rendered as a link in this post: https://mathstodon.xyz/@TeaKayB/110785751529210683

I haven't seen this happening with anything but Guppe groups. It wouldn't surprise me if they expired after a while without use, but I can't see anything that suggests that's what happens...

@feditips
Indeed it does. Why might old mentions have changed? Any ideas?
@mtbos

@feditips
Hmm, so I wonder why the mention isn't a link. Will this one work, I wonder: @mtbos ?

@feditips
Is that something that might happen automatically? I don't know why anyone would block it on purpose. It was barely used.

@feditips
Can a group be deleted by someone? The Guppe group mentioned in this post seems to no longer exist either: https://mathstodon.xyz/@ColinTheMathmo/109395514020842411

@feditips
I mean the group stopped existing. The mentions of the group in existing posts stopped being links and turned into plain text.

@feditips
I tried this out with a Guppe group a while ago, but I went back a few days later and it had disappeared. I'm assuming they do that after a particular period of inactivity - about idea how long that is? I can't find any info on that.

The group I had in mind would get bursts of activity every month or so and quiet in between, rather than sustained activity every day. Is there a better option for that sort of situation?