The Playlist Updated +Created
Great reports to how 2022-Ciro Santilli views how OurBigBook.com could go. Ciro can't help to feel that he is a mixture of both of the vision, tech and people guy. Not as extreme as any of them, but more like a well rounded (and less good individually) version of each. High flying bird vs gophers.
Elliptic curve over a finite field Updated +Created
Polar coordinate system Updated +Created
PlanetMath Updated +Created
Based on GitHub pull requests: github.com/planetmath
Joe Corneli, of of the contributors, mentions this in a cool-sounding "Peeragogy" context at metameso.org/~joe/:
I earned my doctorate at The Open University in Milton Keynes, with a thesis focused on peer produced support for peer learning in the mathematics domain. The main case study was planetmath.org; the ideas also informed the development of “Peeragogy”.
Email Updated +Created
Ciro Santilli's email can be found by cloning one of his repositories on GitHub. It is also given at: Section "How to contact Ciro Santilli".
Gurdwara Updated +Created
Theses places give out free food all the time.
The first time Ciro Santilli went to one was when an Indian friend of his took him to the one in the North of Paris when they were living there in the first half of the 2010's, the Gurdwara Singh Sabha France.
Instead of just talking, those people really go out, and put food on the plate for anyone who needs it (or even for those that don't really need it! Although who would be so souless to eat for free and not donate a few bucks if they can afford to???). There's a beauty to that.
Writing this also remembered Ciro of non-religious groups that would give out free food to the poor at
Enthalpy Updated +Created
Adds up chemical energy and kinetic energy.
Wikipedia mentions however that the kinetic energy is often negligible, even for gases.
The sum is of interest when thinking about reactions because chemical reactions can change the number of molecules involved, and therefore the pressure.
To predict if a reaction is spontaneous or not, negative enthalpy is not enough, we must also consider entropy via Gibbs free energy.
Merge two or more commits into one Updated +Created
Before
7 my-feature HEAD
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6
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5 master
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4
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3
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1
Oh, commit 6 was just a temporary step, should be put together with commit 7:
git rebase -i HEAD~2
Mark 6 to be squashed.
After:
67 my-feature HEAD
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5 master
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4
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Better now, ready to push.
Infinity Updated +Created
Chuck Norris counted to infinity. Twice.
There are a few related concepts that are called infinity in mathematics:
  • limits that are greater than any number
  • the cardinality of a set that does not have a finite number of elements
  • in some number systems, there is an explicit "element at infinity" that is not a limit, e.g. projective geometry
Everipedia Updated +Created
Metabolic pathway Updated +Created
Some notable examples:
Cheap oscilloscope Updated +Created
Video 1.
DIY Oscilloscope Kit (20$) VS Regular DS Oscilloscope (400$) by Great Scott (2016)
Source.
Video 2.
Hantek 6022BE Review by Adrian's Digital Basement (2022)
Source.
Rigetti Computing Updated +Created
Video 1.
Forest: an Operating System for Quantum Computing by Guen Prawiroatmodjo (2017)
Source. The title of the talk is innapropriate, this is a very basic overview of the entire Rigetti Computing stack. Still some fine mentions. Her name is so long, TODO origin? She later moved to Microsoft Quantum: www.linkedin.com/in/gueneverep/.
GitHub Pages Updated +Created
Lecture 5 Updated +Created
  • something about finding a unitary representation of the poincare group
Wei Dai Updated +Created
Intel manual Updated +Created
Although it is impossible to understand without examples in mind, try to get familiar with the manuals as soon as possible.
Specially interesting is Figure 4-4 "Formats of CR3 and Paging-Structure Entries with 32-Bit Paging", which gives the key data structures.
Ciro Santilli's undergrad studies at the University of São Paulo Updated +Created
Ciro's official diploma from the University of São Paulo read "Automation and Control Engineer at the Polytechnic School of the University of São Paulo".
The University of São Paulo had been elected the best South American university in the Times Ranking 2013 (archive) in all subjects.
Ciro finished the course with honors of "The Best Student in Automation and Control of the year 2013".
Ciro didn´t learn basically any control engineering however unfortunately. He did only the 3 base years of the electrical engineering course, and the rest got lost on stupid politics of having to go back to do 6 months from France to validate his Brazilian degree, see also: Section "Don't force international exchange students to come back early".
Doing physics means calculating a number Updated +Created
In Physics, in order to test a theory, you must be able to extract a number from it.
It does not matter how, if it is exact, or numerical, or a message from God: a number has to come out of the formulas in the end, and you have to compare it with the experimental data.
Many theoretical physicists seem to forget this in their lectures, see also: Section "How to teach and learn physics".

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