Ciro Santilli @cirosantilli 37

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OpenUSD Updated 2025-07-16

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Squeezed state of light Updated 2025-07-16

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A squeezed coherent state of light.

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Fashion MNIST Updated 2025-07-16

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Same style as MNIST: 28x28 grayscale images, but with clothes rather than hand written digits.

It was designed to be much harder than MNIST, and more representative of modern applications, while still retaining the low resolution of MNIST for simplicity of training.

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Feijoada Updated 2025-07-16

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Linux distribution Updated 2025-07-16

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Markua Updated 2025-07-16

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In leanpub you write your book in a markdown variant they call Markua, marketed as "markdown for books".

TODO is there a reference implementation that runs locally for HTML output? Or the only reference implementation is closed under leanpub?

Spec: markua.com/

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Muon Updated 2025-07-16

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Softcover (LaTeX) Updated 2025-07-16

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github.com/softcover/softcover

LaTeX subset that output nicely to HTML.

Too insane though due to LaTeX roots, better just move to newer HTML-first markups like OurBigBook Markup or markdown.

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University of Bristol Updated 2025-07-16

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University of Manchester Updated 2025-07-16

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Wikidata Updated 2025-07-16

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Fusion ignition Updated 2025-07-16

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Lie bracket of a matrix Lie group Updated 2025-07-16

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[X, Y] = X Y - Y X

(1)

This makes it clear how the Lie bracket can be seen as a "measure of non-commutativity"

Because the Lie bracket has to be a bilinear map, all we need to do to specify it uniquely is to specify how it acts on every pair of some basis of the Lie algebra.

Then, together with the Baker-Campbell-Hausdorff formula and the Lie group-Lie algebra correspondence, this forms an exceptionally compact description of a Lie group.

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Marijuana Updated 2025-07-16

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Meter Updated 2025-07-16

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Mt. Gox Updated 2025-07-16

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The first Bitcoin exchange. Coded as a hack, and they didn't manage to fix the hacks as the site evolved in a major way, which led to massive hacks.

Their creation is clearly visible on the archive history of bitcoin.org: web.archive.org/web/20100701000000*/bitcoin.org which started having massively more archives since Mt. Gox opened.

Video 1.

One Mistake Brought Down This FBI Most Wanted Hacker by Crumb (2023)

Source. Good overview of Mt. Gox.

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One parameter subgroup Updated 2025-07-16

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The one parameter subgroup of a Lie group for a given element

M

of its Lie algebra is a subgroup of

G

given by:

e^{tM} \in G ∣ t \in R

(1)

Intuitively,

M

is a direction, and

t

is how far we move along a given direction. This intuition is especially vivid in for example in the case of the Lie algebra of

SO (3)

, the rotation group.

One parameter subgroups can be seen as the continuous analogue to the cycle of an element of a group.

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Piezoelectric motor Updated 2025-07-16

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The best technology YouTube channels Updated 2025-07-16

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You can learn more from older students than from faculty Updated 2025-07-16

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Wikipedia mentions quoting his Nobel Prize biography:

In Monod's studies he discovered that the course work was decades behind the current biological science. He learned from other students a little older than himself, rather than from the faculty.

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