Alon (they/them)
@alonlevy.bsky.social
Transit researcher in Berlin. Lived in Tel Aviv, Singapore, the Riviera, New York, Providence, Vancouver, Stockholm, Paris. https://pedestrianobservations.com/ http://patreon.com/alonlevy alon@pedestrianobservations.com @alon@mastodon.social
Just say "I support 7.10," don't dance around your point.
November 27, 2025 at 4:14 AM
Just say "I support 7.10," don't dance around your point.
Why do I have so many mutuals following this asshole? Please block. (The screencapped post is about 7.10; "the resistance" is 7.10.)
November 25, 2025 at 6:29 PM
Why do I have so many mutuals following this asshole? Please block. (The screencapped post is about 7.10; "the resistance" is 7.10.)
I present to you, the minister-president of Bavaria for life.
November 24, 2025 at 10:37 PM
I present to you, the minister-president of Bavaria for life.
Berlin today if SPD had adopted the WTB plan in 1930 and used it to run Otto Braun for president in 1932. There might be a pair of rusty postwar battlecruisers as museum ships somewhere off Hamburg.
November 18, 2025 at 2:59 PM
Berlin today if SPD had adopted the WTB plan in 1930 and used it to run Otto Braun for president in 1932. There might be a pair of rusty postwar battlecruisers as museum ships somewhere off Hamburg.
18. This gif, via Wikipedia, shows a continuous zooming in on the Mandelbrot. On two occasions we see a small copy of the Mandelbrot appear - but it's not quite the same, and has somewhat different filaments around it, including one connecting it to the main shape. Close, but not quite self-similar.
November 15, 2025 at 11:17 PM
18. This gif, via Wikipedia, shows a continuous zooming in on the Mandelbrot. On two occasions we see a small copy of the Mandelbrot appear - but it's not quite the same, and has somewhat different filaments around it, including one connecting it to the main shape. Close, but not quite self-similar.
12. The Julia set above is connected, separating the complex plane into three Fatou components. But it can also be disconnected, surrounded by just a single Fatou component. This is the Julia set of f(z) = z^2 + (-0.4 + 0.6i).
November 15, 2025 at 11:03 PM
12. The Julia set above is connected, separating the complex plane into three Fatou components. But it can also be disconnected, surrounded by just a single Fatou component. This is the Julia set of f(z) = z^2 + (-0.4 + 0.6i).
10. For a more complex example, set f(z) = z - (z^3 - 1)/3z^2. There are 3 Fatou components, each with an attracting fixed point. Each point of the Julia set has to be adjacent to all 3 regions at once, forcing the fractal shape, since a simple curve has just an inside and an outside, 2 regions.
November 15, 2025 at 10:54 PM
10. For a more complex example, set f(z) = z - (z^3 - 1)/3z^2. There are 3 Fatou components, each with an attracting fixed point. Each point of the Julia set has to be adjacent to all 3 regions at once, forcing the fractal shape, since a simple curve has just an inside and an outside, 2 regions.
2. Fractals are defined by self-similarity. For a first example, take the Sierpiński triangle. It's formed from subtracting the middle quarter of a triangle to form three smaller triangles, then subtracting the middle quarter of each smaller triangle ad infinitum.
November 15, 2025 at 10:30 PM
2. Fractals are defined by self-similarity. For a first example, take the Sierpiński triangle. It's formed from subtracting the middle quarter of a triangle to form three smaller triangles, then subtracting the middle quarter of each smaller triangle ad infinitum.
1. By popular demand, 🧵 on the Mandelbrot set, fractals, and some analogies outside math. The tl;dr version is that the Mandelbrot set isn't fractal but quasi-fractal and that makes it considerably more complex.
November 15, 2025 at 10:22 PM
1. By popular demand, 🧵 on the Mandelbrot set, fractals, and some analogies outside math. The tl;dr version is that the Mandelbrot set isn't fractal but quasi-fractal and that makes it considerably more complex.
Sure, but in both cases, the NHS's core problem is that it really does get less public spending than any other Northern European (inc. French) system; this isn't a bloated bureaucracy, but it gets to what Stephen was saying about the need for a broad tax hike to fund all of this.
November 15, 2025 at 11:57 AM
Sure, but in both cases, the NHS's core problem is that it really does get less public spending than any other Northern European (inc. French) system; this isn't a bloated bureaucracy, but it gets to what Stephen was saying about the need for a broad tax hike to fund all of this.
November 9, 2025 at 11:09 AM
The Dutch election begins in a few hours, and Transgender Netwerk has a brief voter guide by party:
www.transgendernetwerk.nl/nieuws/trans...
It's notable that inclusive sports have a large majority in the polls - the parties with a yes on that issue poll between 98 and 102 seats out of 150.
www.transgendernetwerk.nl/nieuws/trans...
It's notable that inclusive sports have a large majority in the polls - the parties with a yes on that issue poll between 98 and 102 seats out of 150.
October 29, 2025 at 1:28 AM
The Dutch election begins in a few hours, and Transgender Netwerk has a brief voter guide by party:
www.transgendernetwerk.nl/nieuws/trans...
It's notable that inclusive sports have a large majority in the polls - the parties with a yes on that issue poll between 98 and 102 seats out of 150.
www.transgendernetwerk.nl/nieuws/trans...
It's notable that inclusive sports have a large majority in the polls - the parties with a yes on that issue poll between 98 and 102 seats out of 150.
>moving the SBS to nearby 2-lane aves
Meanwhile, in a country that you can't criticize without Yeger calling you anti-Semitic, even if the majority of the inhabitants of the country agree with your criticism, bus lanes go in the middle of wide roads.
Meanwhile, in a country that you can't criticize without Yeger calling you anti-Semitic, even if the majority of the inhabitants of the country agree with your criticism, bus lanes go in the middle of wide roads.
October 28, 2025 at 1:10 PM
>moving the SBS to nearby 2-lane aves
Meanwhile, in a country that you can't criticize without Yeger calling you anti-Semitic, even if the majority of the inhabitants of the country agree with your criticism, bus lanes go in the middle of wide roads.
Meanwhile, in a country that you can't criticize without Yeger calling you anti-Semitic, even if the majority of the inhabitants of the country agree with your criticism, bus lanes go in the middle of wide roads.
Hitachi technology is very good for queer leftists and our needs.
October 22, 2025 at 10:41 PM
Hitachi technology is very good for queer leftists and our needs.
It works on my machine. What setup did you use that the link is broken?
October 21, 2025 at 3:02 PM
It works on my machine. What setup did you use that the link is broken?
I mocked this up five months ago, details in alt-text; the total width of the lot is 20 m/66', but it can be safely shrunk to around 18 m/60' just making the room a tad narrower, while if the lot is 24 m/80' wide you can add a fourth back-facing bedroom to each apartment.
October 19, 2025 at 1:22 PM
I mocked this up five months ago, details in alt-text; the total width of the lot is 20 m/66', but it can be safely shrunk to around 18 m/60' just making the room a tad narrower, while if the lot is 24 m/80' wide you can add a fourth back-facing bedroom to each apartment.
A few more just as the protest ended. There was also one saying "Trump is a ra_ist and a felon" with a figure holding up C and P signs that wasn't in the picture.
![Six people with four protest signs:
* Do not go gently into this new fight - rage, rage against the fascist right
* We say NUTS to Trump fascism
* No ***king way ["king" is framed by a crown]
* [Confederate flag] <- you lost; [MAGA hat] <- you're next](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:37p4sk6d6bd6onjzh7edqn5y/bafkreiaisiefciijxbednkvlrnmhp6m4v2j7jdr4je5u43vgugnp4yvxme@jpeg)
October 18, 2025 at 2:13 PM
A few more just as the protest ended. There was also one saying "Trump is a ra_ist and a felon" with a figure holding up C and P signs that wasn't in the picture.
Photographed with permission.
October 18, 2025 at 1:39 PM
Photographed with permission.
Hire more black colonial governors (laudatory)
October 15, 2025 at 4:36 PM
Hire more black colonial governors (laudatory)
In the picture, a liberal with influential work on radicals.
October 15, 2025 at 4:31 PM
In the picture, a liberal with influential work on radicals.
There is, but a peripheral minority in the EU's poorest country isn't really what high-speed rail ridership lives on. There are around 500,000 of them and they don't live on any plausible Istanbul-Sofia line.
October 14, 2025 at 4:19 PM
There is, but a peripheral minority in the EU's poorest country isn't really what high-speed rail ridership lives on. There are around 500,000 of them and they don't live on any plausible Istanbul-Sofia line.
The supreme court judges, around the then-president and a notable criminal defendant.
October 7, 2025 at 2:07 AM
The supreme court judges, around the then-president and a notable criminal defendant.
There is shit on the floor of the Berlin Ostbahnhof Geldautomat.
September 26, 2025 at 1:19 PM
There is shit on the floor of the Berlin Ostbahnhof Geldautomat.