Ciro Santilli @cirosantilli 37

It does not matter how many trillions you donate to charity, Bill. If you want to prove your point, make MS Word free and open source and port it to Linux. And then Window implements POSIX-compatible APIs and then deprecate non-POSIX APIs.

Video 1.

Bill Gates Jumps Over Chair

. Source.

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MicroPython by

Ciro Santilli 37  Updated 2025-06-02  +Created 1970-01-01

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It is interpreted. It actually implements a Python (-like ?) interpreter that can run on a microcontroller. See e.g.: Compile MicroPython code for Micro Bit locally.

As a result, it is both very convenient, as it does not require a C toolchain to build for, but also very slow and produces larger images.

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Compile MicroPython code for Micro Bit locally by

Ciro Santilli 37  Updated 2025-06-02  +Created 1970-01-01

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To use a prebuilt firmware, you can just use uflash, tested on Ubuntu 22.04:

git clone https://github.com/bbcmicrobit/micropython
cd micropython
git checkout 7fc33d13b31a915cbe90dc5d515c6337b5fa1660
uflash examples/led_dance.py

What that does is:

convert the MicroPython code to bytecode
join it up with a prebuilt firmware that ships with uflash which contains the MicroPython interpreter
flashes that

To build your own firmware see:

Got it working: Compile MicroPython code for Micro Bit locally on Ubuntu 22.04 with your own firmware

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Micro Bit example by

Ciro Santilli 37  Updated 2025-06-02  +Created 1970-01-01

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microbit/micropython/uart.py: the Micro BIt comes with a UART simulator via the USB connection, it is very convenient: support.microbit.org/support/solutions/articles/19000022103-outputing-serial-data-from-the-micro-bit-to-a-computer To output data to the computer simply use Python print. To receive you can e.g. use GNU screen:
```
screen /dev/ttyACM0 115200
```
It appears to be very unreliable however, some times it shows up, sometimes it doesn't.

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Nanometer by

Ciro Santilli 37  Updated 2025-06-02  +Created 1970-01-01

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Quantum mechanical re-interpretation of kinematic and mechanical relations by Heisenberg (1925) by

Ciro Santilli 37  Updated 2025-06-02  +Created 1970-01-01

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This Heisenberg's breakthrough paper on matrix mechanics which later led to the Schrödinger equation, see also: history of quantum mechanics.

Published on the Zeitschrift für Physik volume 33 page pages 879-893, link.springer.com/article/10.1007%2FBF01328377

Modern overview: www.mat.unimi.it/users/galgani/arch/heisenberg25amer_j_phys.pdf

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Mathieu group

M_{23}

Ciro Santilli 37  Updated 2025-06-02  +Created 1970-01-01

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Renormalization by

Ciro Santilli 37  Updated 2025-06-02  +Created 1970-01-01

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www.quora.com/What-is-renormalization-in-quantum-theory-explained-to-graduated-only-not-doctors/answer/Paul-Mainwood covers the simpler Ising model case

Video 1.

The Biggest Ideas in the Universe | 11. Renormalization by Sean Carroll (2020)

Source. Gives a very quick and high level overview of renormalization. It is not enough to satisfy Ciro Santilli as usual for other Sean Carroll videos, but it goes some way.

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Is the MacOS kernel open source? by