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j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

"Often it's easier to work with infinity than a large finite number - and often it's a good enough approximation"
( @johncarlosbaez )

ppscrv,
@ppscrv@mathstodon.xyz avatar

@j_bertolotti @johncarlosbaez This amplifier has a gain of about 10000, which is pretty close to infinity, if you think about it.

  • Electronics professor ca 1987
RobertJackson58585858,
@RobertJackson58585858@masto.ai avatar

@j_bertolotti @johncarlosbaez

"What are the prime factors of this very very large number?"

"Very very large, you say? Approximately infinitely large? That's easy ... every prime."

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

If you write me an email out of the blue, without any explanation or context, and assuming that I already know what you are talking about, I have news for you: I have no clue what you are talking about.

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

Economics 101 (or: how sometimes singular limits can be sorted out empirically)
https://smbc-comics.com/comic/demand
(by @ZachWeinersmith )

j_bertolotti, to physics
@j_bertolotti@mathstodon.xyz avatar


The Lorenz system is a common example of chaotic dynamics and of a strange attractor.
Points with very similar initial conditions initially evolve very similarly to each other, until their trajectories diverge from each other, and start moving on a "butterfly"-shaped fractal.

Trajectories of a number of points following the Lorenz system equations, rendered as yellow tubes.

j_bertolotti,
@j_bertolotti@mathstodon.xyz avatar

@narain
Then I misunderstood the question 😉
@bleuje

bleuje,
@bleuje@mastodon.social avatar

@j_bertolotti @narain I appreciate both of your answers!

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

Who likes train models?
(at https://www.hzero.com/)

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

Any time you want to buy a piece of optical equipment that is essentially a black box and costs multiple tens of thousands of €, consider the option to give me half the money and 2 weeks instead.

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

Word cloud from Google Scholar
(make your at https://shiny.rcg.sfu.ca/u/rdmorin/scholar_googler3/)

Marekgluza,
@Marekgluza@mathstodon.xyz avatar

@j_bertolotti really cool!!! 😄

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

If the "best commercial option" available is bad, the cost-effective way to deal with it is to seriously wonder if you really need that product/service (and it will likely turn out that no, you don't really need it).

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

I seem to have passed the 2k followers, so I will do what I used to do on the birdsite, and make a brief (and invariably incomplete) list of people I follow, who have less than half of my follower count, and who I think you should follow. (I will exclude people who are not really active here on Mastodon)

@robinhouston Mathematical thoughts and musing.
@sfera314 Visualizations of Math and Physics
@lana AI, but mostly follow for the dog 😉
@DrMLHarris Science news
@narain Computer science
@UnsolvedMrE Recreational Math
@thosgood Math, usually above my level
@RobJLow Musings about Math&co
@ben Making videogames
@testtubegames Making educational videogames about Physics
@BrunoLevy01 Computing and computational Physics

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

How to do interdisciplinary research:

  • Take a person very good at topic A.
  • Take a person very good at topic B.
  • Have these two people talk to each other for 2-3 years.
  • Now you have a potential seed for interdisciplinary research.

Anything short of this is doomed to fail.

TonyVladusich,
@TonyVladusich@mathstodon.xyz avatar

@j_bertolotti

Oh I feel this viscerally! @troy_s and I have talked almost daily about color and perception for over a year, and we struggle each day to make ourselves understood because we are coming at the topic from completely different backgrounds and perspectives. Myself from a color science and perception background and he from an arts, film and photography angle. Yet we are finding a richly fertile nexus of ideas that is really exciting. If we don’t kill each other first, I think we will produce some really important research artefacts!

tomdelattre,
@tomdelattre@piaille.fr avatar

@j_bertolotti Nah, just force them to compete for funds by writing half-baked projects together after two video-calls. Should work a charm.

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

"Definition. The Attentive Reader is a quasi-mythical being whose existence has been postulated, and often tacitly assumed, by textbook writers. Citations show that the Attentive Reader has, in addition to an eidetic memory for the work itself, an infinite attention span, and an uncanny knack for predicting and rationalising the wild turns of the author's arguments.

Usage example: The Attentive Reader will have realised there is a microscopic disparity between the conclusion of Lemma 1.2.3 and the hypothesis of Proposition 153.1.23. This can be explained by an appeal to the Robinson compactness principle (as modified by Heimholtz)."

(by Mark Wildon http://www.ma.rhul.ac.uk/~uvah099/Sat/reader.html)

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

13 years too late, I finally played Limbo.
I liked the first half. It is a good mood piece, creepy enough without being explicitly gory, and with some ok puzzles.
I didn't like the second half, because the puzzles all become of the "I know exactly what I have to do, but I keep messing the ultra-precise timing of the button-pressing necessary to actually do it".

Joemoeller,

@j_bertolotti I thought you were talking about the game limbo at first.

j_bertolotti,
@j_bertolotti@mathstodon.xyz avatar

@Joemoeller Talking about the videogame that came out in 2010 (too many things called Limbo 🤷🏻‍♂️)

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

Listening to R.E.M. while marking exams, after I haven't listened to them in years.
And asking myself why I haven't listened to them in years.

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

I need a collaboration between Hayao Miyazaki and Hidetaka Miyazaki.
Just for the LOL

dduque,
@dduque@mathstodon.xyz avatar

@j_bertolotti The action could take place at this prefecture https://en.wikipedia.org/wiki/Miyazaki_Prefecture

j_bertolotti, to random
@j_bertolotti@mathstodon.xyz avatar

They are shutting down "The Crew". Not my kind of game, but it is a more and more common practice for companies to decide to kill remotely a game you paid full price for. And my fear is that videogames are just the spearhead.
Ross has been a long time Cassandra about this problem, and has just released a video-essay about it (actually, you can just listen to it. The video part os not very important.)
He is trying to find out if this can be legally challenged, and looking for people with more experience to give advice (@pluralistic ?)
https://www.accursedfarms.com/posts/dead-game-news/dead-game-news-the-crew-r853/

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