Hamilton's equations by Ciro Santilli 35 Updated +Created
Analogous to what the Euler-Lagrange equation is to Lagrangian mechanics, Hamilton's equations give the equations of motion from a given input Hamiltonian:
So once you have the Hamiltonian, you can write down this system of partial differential equations which can then be numerically solved.
1973 Nobel Prize in Physics by Ciro Santilli 35 Updated +Created
To Brian Josephson for the prediction of the Josephson effect.
1987 Nobel Prize in Physics by Ciro Santilli 35 Updated +Created
This was so hot (no pun intended) and reproducible that the prize was awarded one year after discovery. Quite rare in those days already.
2009 Nobel Prize in Physics by Ciro Santilli 35 Updated +Created
This one took a while! Major developments were from the 70s! Perhaps it took the Internet revolution to make its importance clear.
Dual space by Ciro Santilli 35 Updated +Created
The dual space of a vector space , sometimes denoted , is the vector space of all linear forms over with the obvious addition and scalar multiplication operations defined.
Since a linear form is completely determined by how it acts on a basis, and since for each basis element it is specified by a scalar, at least in finite dimension, the dimension of the dual space is the same as the , and so they are isomorphic because all vector spaces of the same dimension on a given field are isomorphic, and so the dual is quite a boring concept in the context of finite dimension.
One place where duals are different from the non-duals however is when dealing with tensors, because they transform differently than vectors from the base space .
2014 Nobel Prize in Physiology and Medicine by Ciro Santilli 35 Updated +Created
Enable reference features into ourbigbook.com by Ciro Santilli 35 Updated +Created
Currently, none of the crucial cross file features like \x, \Include and table of contents are working. I was waiting until the above mentioned features were done, and now I'm going to get to that.
Ciro's Edict #5 by Ciro Santilli 35 Updated +Created
2021 Nobel Prize in Physiology and Medicine by Ciro Santilli 35 Updated +Created
It is quite amusing that the starting point to identifying the heat one was capsaicin, as it stimulates the exact same receptor!!!
2023 Nobel Prize in Chemistry by Ciro Santilli 35 Updated +Created
Project to explain each Nobel Prize better by Ciro Santilli 35 Updated +Created
Understand and explain amazingly every single Nobel Prize in physics, chemistry and biology. Since in particular the Nobel Foundation is unable to do that for any at all, especially of the key old ones, e.g. www.nobelprize.org/prizes/physics/1965/summary/. Hopeless.
To be fair, those in theoretical physics at least basically come down to reading a bunch of books. But perhaps anything slightly more experimental could have
Issue tracker by Ciro Santilli 35 Updated +Created
Every article now has a (very basic) GitHub-like issue tracker. Comments now go under issues, and issues go under articles. Issues themselves are very similar to articles, with a title and a body.
This was part of 1.0, but not the first priority, but I did it now anyways because I'm trying to do all the database changes ASAP as I'm not in the mood to write database migrations.
Here's an example:
https://raw.githubusercontent.com/cirosantilli/media/master/OurBigBook_issue_list_on_article_page.png
Competitive programming by Ciro Santilli 35 Updated +Created
A waste of time like the rest of the knowledge olympiads.
Breakthrough Prize by Ciro Santilli 35 Updated +Created
By Zuckerberg. The selection seems decent. And natural sciences only, which is good. A bit more application oriented than the Nobel Prize it seems, e.g. 2022 separates physics and fundamental physics.
Appears to explain award reasoning even worse than the Nobel Foundation.
LINPACK benchmarks by Ciro Santilli 35 Updated +Created
Pinned article: ourbigbook/introduction-to-the-ourbigbook-project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Video 1.
Intro to OurBigBook
. Source.
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
    Video 2.
    OurBigBook Web topics demo
    . Source.
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    • to OurBigBook.com to get awesome multi-user features like topics and likes
    • as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact