Get notifications from Hacker News comments by
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
Real world applications of the Lebesgue integral by
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
In "practice" it is likely "useless", because the functions that it can integrate that Riemann can't are just too funky to appear in practice :-)
Its value is much more indirect and subtle, as in "it serves as a solid basis of quantum mechanics" due to the definition of Hilbert spaces.
A Python wrapper over a bunch of numeric and computer algebra system packages to try and fully replace MATLAB et. al.
For example, their
Quickstart tutorial at: www.sagemath.org/tour-quickstart.html From this we see that they are very opinionated, you don't need to import anything, everything has a pre-defined global name, which is convenient, e.g.:is the 3D vector space over the rationals. This also suggests that they are quite focused on computer algebra as opposed to numerical.
Like Jimmy Wales, he used to work in finance and then quit. What is it with those successful e-learning people??
Quora is crap in many, many senses, but in part due to some bad Stack Overflow policies, it is the best crap we've got for certain (mostly useless) subjects. Until OurBigBook.com dominates the world.
The worst thing about quora is that you cannot subscribe only to certain subjects on your feed. Quora just keeps pumping shit you never subscribed to, no matter what. Ciro, for sport, unfollowed every single idiotic subject it was proposing, but it didn't work, sooner or later Quora just keeps pumping more shit back. Mind you, some of that shit is fun. But it's still shit. Though on second thought, YouTube also randomly decides to reset Ciro's humongous "don't recomend this shitty channel" choices from time to time, which is not much different...
Other terrible things, they just seem to have an incredible ability of making the website worse and more annoying over time! Truly amazing:
- around 2022, quora started showing "related" answers to other questions, possibly before actualy answers to the question itself. This, together with an insane number of inline ads that look very similar to answers, makes it very hard to decide what is an actual answer or not!!! E.g.: people complaining:
- around 2021, quora started expanding any link as a huge preview box that completely takes over the answer, and it is very hard to stop it from doing so
- Quora used to show question details beyond the title by default, but stopped: www.reddit.com/r/OutOfTheLoop/comments/uqyvfp/comment/jd6go1b/?utm_source=share&utm_medium=web2x&context=3
Quora is getting so bad that it is basically being killed by Reddit, especially after they lifted the 6-month hard thread lock...
See also: cirosantilli.com/china-dictatorship/quora for a coverage of the intense pro-CCP astroturfing present on the website.
www.zdnet.com/article/googles-quantum-focused-sandbox-division-is-being-spun-off/ Google's quantum-focused Sandbox division is being spun off (2022)
This is the true key question: what are the most important algorithms that would be accelerated by quantum computing?
Some candidates:
- Shor's algorithm: this one will actually make humanity worse off, as we will be forced into post-quantum cryptography that will likely be less efficient than existing classical cryptography to implement
- quantum algorithm for linear systems of equations, and related application of systems of linear equations
- Grover's algorithm: speedup not exponential. Still useful for anything?
- Quantum Fourier transform: TODO is the speedup exponential or not?
- Deutsch: solves an useless problem
- NISQ algorithms
Maybe there is some room for doubt because some applications might be way better in some implementations, but we should at least have a good general idea.
However, clear information on this really hard to come by, not sure why.
Whenever asked e.g. at: physics.stackexchange.com/questions/3390/can-anybody-provide-a-simple-example-of-a-quantum-computer-algorithm/3407 on Physics Stack Exchange people say the infinite mantra:
Lists:
- Quantum Algorithm Zoo: the leading list as of 2020
- quantum computing computational chemistry algorithms is the area that Ciro and many people are te most excited about is
- cstheory.stackexchange.com/questions/3888/np-intermediate-problems-with-efficient-quantum-solutions
- mathoverflow.net/questions/33597/are-there-any-known-quantum-algorithms-that-clearly-fall-outside-a-few-narrow-cla
The Machiavellian Stack Overflow contributor by
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
- always upvote questions you care about, to increase the probability that they will get answered
- never upvote other people's answers unless you might gain from it somehow, otherwise you are just giving other high reputation users more reputation relative to you
- only mark something to close or as a duplicate if it will bring you some advantage, because closing things creates enemies, especially if the OP has a high profileOne example advantage is if you have already answered the question (and the duplicate as well in case of duplicates), because this will prevent competitors from adding new better answers to overtake you.
- protect questions you've answered whenever someone with less than 10 reputation answers it with a bad answer, to prevent other good contributors from coming along and beating you
- when you find a duplicate pool answer every question with similar answers.Alter each answer slightly to avoid the idiotic duplicate answer detector.If one of the question closes, it is not too bad, as it continues netting you to upvotes, and prevents new answers from coming in.
- follow on Twitter/RSS someone who comments on the top features of new software releases. E.g. for Git, follow GitHub on Twitter, C++ on Reddit. Then run back to any question which has a new answer.
- always upvote the question when you answer it:
- the more upvotes, more likely people are to click it.
- the OP is more likely to see your answer and feel good and upvote you
- if a niche question only has few answers and you come with a good one, upvote the existing ones by other high profile users.This may lead to them upvoting or liking you.
- always upvote comments that favor you:
- "I like this answer!" on your answers
- "also look at that question" when you have answered that question
- if you answer a question by newbie without 15 reputation, find their other questions if any and upvote them, so that the OP can upvote your answer in addition to just accepting
- if a question has 50 million answers and you answer it (often due to a new feature), make a comment on the question pointing to your answer
- if you get a downvote, always leave a comment asking why. It is not because you care about their useless opinion, but because other readers might see the comment, feel sorry for you, and upvote.
- ask any questions under a separate anonymous accounts. Because:
- intelligent people are born knowing, and don't ever ask any questions, so that would hurt your reputation
- downvoting questions does not take 1 reputation away from the downvoter, and so it greatly opens the door for your opponents to downvote you without any cost.
Stack Overflow should pay its top contributors by
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
One may dream.
And if not, then they should fix it.
Notably, more people would try to "game" the system by quickly answering lots of small impact answers which could tilt things off a bit. Not to mention straight out fraud.
Stack Overflow policy that you cannot harshly criticize the character of a politician by
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
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!
Intro to OurBigBook
. Source. We have two killer features:
- 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-calculusArticles 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/derivativeVideo 2. OurBigBook Web topics demo. Source. - 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: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.
- 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
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.Figure 3. Visual Studio Code extension installation.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. - Infinitely deep tables of contents:
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