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peterb

@peterb.mathstodon.xyz.ap.brid.gy

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effort + coffee = software

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@peterb.mathstodon.xyz.ap.brid.gyOct 11, 2026, 9:32 PM

@nelson there's a thumbnail of one of the dresses in that screenshot!

@peterb.mathstodon.xyz.ap.brid.gyOct 11, 2026, 5:27 PM

This is Car Mechanic Simulator but for tailoring.

@peterb.mathstodon.xyz.ap.brid.gyOct 11, 2026, 1:38 PM

Definitely found myself incredibly concerned not that the dresses meet the numeric targets, but that I think they look good!

Dressmaking is surprisingly technical
@peterb.mathstodon.xyz.ap.brid.gyOct 11, 2026, 1:34 PM

Gonna have to stop myself from streaming this great game about making pretty dresses. Incredibly addictive. ("Dressmaker" on Steam. It has real "now draw the rest of the owl" energy (complimentary)).

@peterb.mathstodon.xyz.ap.brid.gyOct 9, 2026, 3:40 PM

Dead Ends in Proving: I describe trying to prove a simple property of my emulator in #Lean 4 by writing "For all x..." theorems, rather than by construction.

It went poorly!

https://www.youtube.com/watch?v=8ZcyQSfrMzs

Thumbnail painting: detail from "The Temptation of St. Anthony" (circa […]

@peterb.mathstodon.xyz.ap.brid.gyOct 2, 2026, 2:44 PM

Chapter 7 of Rustlings is all about structures. I complain more about Rust.

"Expressions are better than statements all of the time."

Thumbnail painting: Heads Landscape (1928) by Francis Picabia

https://youtu.be/aGU_3i5BYVg

@peterb.mathstodon.xyz.ap.brid.gySep 29, 2026, 3:07 AM

Martin Amis once wrote "It was...a symmetrical convenience—for Stalin—that a true description of the Soviet Union exactly resembled a demented slander of the Soviet Union." So anyway this is a subtweet about the EA / "rationalist" / AI community in the Bay Area.

@peterb.mathstodon.xyz.ap.brid.gySep 28, 2026, 12:09 AM

How is it possible that Slapp Happy's _Casablanca Moon_ hasn't made it into a TV or movie soundtrack yet?

https://www.youtube.com/watch?v=ppq9t7cWDRg

@peterb.mathstodon.xyz.ap.brid.gySep 25, 2026, 5:06 PM

6502 Opcodes in Lean! I continue porting my NES emulator from Haskell to Lean. In this edited (and much shorter) version of the 4-hour livestream, I muse a bit about syntax and my philosophy of programming. The thumbnail painting is Gisele (1908) by Kees Van Dongen […]

@peterb.mathstodon.xyz.ap.brid.gySep 23, 2026, 11:56 AM

@juergen_hubert Wouldn't this be a natural consequence of writing the fairy tales down at a time when only nobles or clergy were literate? (I'd imagine that this level of rewriting did not happen as much for oral tales, but I don't know the statistics.)

@peterb.mathstodon.xyz.ap.brid.gySep 18, 2026, 2:57 PM

New video: Let's Try Chipwits Worlds ChipWits was an incredible 1984 programming game for the Mac (and other platforms), written in Forth, where you programmed robots to accomplish. Recently remade for modern platforms, the creators have now released a demo of Chipwits Worlds where instead of […]

@peterb.mathstodon.xyz.ap.brid.gySep 11, 2026, 2:40 PM

Today we get into the first chapter of Rustlings that tackles something truly Rust-specific: move semantics. Peter is unimpressed with Rust so far, and also with Rustlings as a didactic tool. Thumbnail painting: "The Execution of Lady Jane Grey" (1833) by Paul Deleroche […]

@peterb.mathstodon.xyz.ap.brid.gySep 6, 2026, 5:04 PM

My friend Nate is taunting me by posting AI summaries of my video from last year about how I'm ambivalent about AI. (Original video: https://www.youtube.com/watch?v=oOcLnNLAHek)


In this video (0:09-18:03), the creator, Tea Leaves, reflects on

the rapid evolution of technology and shares personal

experiences regarding the use of Large Language Models

(LLMs) in software development.

Key themes include:

+ Historical Context: Drawing from Alvin Toffler's Future
Shock and James Burke's The Day the Universe Changed,
the creator discusses how accelerating technological change
leads to stress and shifts in how we perceive reality and truth
(0:25-8:45)

Ā« The Personal Conflict: The creator, who values the
aesthetic and personal satisfaction of coding, details a past
struggle to write a parser for a NAND to Tetris assembler
project (6:38-8:54).

Ā« The Turning Point: After an initial failure two years ago, the
creator successfully used an LLM to generate the code for
the parser in one try. This sparked feelings of both
satisfaction and deep apprehension about the speed of Al
advancement (8:57-11:51).

Ā« Future Outlook: The creator contrasts a "bad path," where
users lose the ability to learn and understand fundamentals,
with a "good path," where Al serves as a tool to move human
problem-solving to higher levels of abstraction, similar to
how the printing press transformed the preservation and
democratization of knowledge (15:00-17:08).
@peterb.mathstodon.xyz.ap.brid.gySep 6, 2026, 2:40 AM

@nelson It's useless and can't do anything right, which is why we must work so hard to convince people that using it is literally fascism.

@peterb.mathstodon.xyz.ap.brid.gySep 6, 2026, 2:30 AM

@nelson I was promised that it's all smoke and mirrors.

@peterb.mathstodon.xyz.ap.brid.gySep 6, 2026, 1:37 AM

@nelson Looking forward to watching people get angry at you for doing a useful thing.

@peterb.mathstodon.xyz.ap.brid.gySep 4, 2026, 3:34 PM

As part of boot-strapping my NES emulator, I port my 6502 CPU emulator from #Haskell to #Lean. Some architectural changes – some encouraged by the language, and others simply from having a second bite at the apple – are made.

Thumbnail painting: La BohĆ©mienne Endormie (1897) by Henri Rousseau […]

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