herid @herid@social.cleverlibre.org

Elon Musk plans to reinstate nearly ALL previously banned Twitter accounts — to the alarm of activists and online trust and safety experts. The decision will have dangerous consequences, particularly for vulnerable communities. https://www.washingtonpost.com/technology/2022/11/24/twitter-musk-reverses-suspensions/ #twitter #twittermigration #tech #technology #elon #TwitterMigrate

50 WAYS TO LEAVE YOUR TWITTER

You just pin your last tweet, Pete,
Request your archive, Clive,
You don’t need a blue tick, Vic,
Just get yourself free.

Hop on the tusk, Gus,
You don’t need to delete much,
Except your DMs, Jen,
And get yourself free.

Use Debirdify, Di,
Provide some alt tags, Mags,
Add a content warning, Tim,
To post sensitively.

Remember to boost, Ruth
You don't need to deny truth,
Just drop off the perch, Dirk,
And get yourself free.
#VerseThurday #TwitterMigration #FediTips

One of the quirks of professional mathematics is that researchers are discouraged from speculating too far beyond the range of what they can actually prove. To quote Minhyong Kim (from https://mathoverflow.net/a/38694/766): "it's almost as though definite mathematical results are money in the bank. After you've built up some savings, you can afford to spend a bit by philosophizing. But then, you can't let the balance get too low because people will start looking at you in funny, suspicious ways."

There’s no incentive for people who follow you on Twitter to leave & follow you here instead if you keep posting on Twitter. Take a leap of faith.

Nena - 99 Luftballons

https://youtu.be/Fpu5a0Bl8eY

#FavoriteMusic 12/

"In the U.S.’s efforts to 'move on' from thinking about #Covid, it has created a 'new normal' that is deeply abnormal — one in which we normalize resorting to crisis measures, such as treating patients in tents, instead of using common-sense public health strategies. Treating Covid like the flu — or the #flu like Covid — has effectively meant that we treat neither illness as if it were a serious threat to health systems and to public health."

https://www.statnews.com/2022/11/22/tripledemic-hurricane-include-community-prevention-efforts/

The flight of NASA's Artemis (purple) uses two very close encounters with the moon's gravity (green) to changes its trajectory to get back to the earth (blue.) Amazing.

What are the inner automorphisms of the octonions?

Of course this is an odd question. Since the octonions are nonassociative you might even guess the map

𝑓: 𝕆 → 𝕆

given by

𝑓(𝑥) = 𝑔𝑥𝑔⁻¹

for a nonzero octonion 𝑔 isn't well-defined! After all, maybe we have

(𝑔𝑥)𝑔⁻¹ ≠ 𝑔(𝑥𝑔⁻¹)

But in fact this is a red herring.

(1/n)

(Below we see my friend the physicist Nichol Furey, a big fan of the octonions, standing in front of the Fano plane, which can be used to multiply them.)

Once in a Blue Moon

Sydney Forest

https://youtu.be/ddaF_9bCMSA

#FavoriteMusic 11/

If you were unfortunate enough to e-file your US #tax using HR Block, Taxact or Taxslayer, your most sensitive financial information was nonconsenually shared with Facebook, where it was added to the involuntary dossier the company maintains billions of people, including people who don't have Facebook accounts.

1/

You can define operations on [-∞,∞) depending on a positive real number called the 'temperature' 𝑇 in such a way that:

1) for any 𝑇 > 0, you get a rig isomorphic to [0,∞) with its usual + and × . (A 'rig' is a ring without negatives.)

2) in the limit 𝑇→ 0, you get a version of the 'tropical rig', where addition is min and multiplication is + on [-∞,∞).

Yeah, the terminology is bad: the 'tropical rig' is a low-temperature limit! They should have called it the 'arctic rig'.

(1/n)

Our toddler has been testing positive on rapid antigen tests for more than 6 months. We’ve consulted many doctors and specialists and were told they are seeing a lot of “persistent viral shedding” in this age group. Guess what the advice was... STOP TESTING!

https://twitter.com/fitterhappierAJ/status/1594739187752013824?s=20&t=Rfqg1dKUHk16iI957NZMyw

#covid19 #CovidIsNotOver #COVIDisAirborne

Epidemiologist @deonandan, on the efficacy of masks in light of surging numbers of respiratory diseases.

The short version: "Masks work. Of course they do. They work as imperfect personal protection and as highly impactful community protection."

A great deal of data and nuance in his post.

http://blog.deonandan.com/wordpress/2022/11/covid-19-do-masks-work.html

#masks #COVID #RSV #flu #influenza #Epidemiologist

Musk’s reign at Twitter has increased risks to users—especially those in crisis zones around the world who flocked to Twitter for expression during unrest—by unraveling guardrails against misinformation, harassment, and censorship. https://www.eff.org/deeplinks/2022/11/twitters-monetizable-users-not-human-rights-matter-most-under-musks-rein-leaving

An official Google social account is now on Mastodon https://ift.tt/3temu56 #ntt