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More articles!

The new site is up! Here's some of what we've converted to written form, often with a some interactive elements sprinkled in where they seemed to fit:

- Calculus

   - Chapter 1: The essence of calculus
   - Chapter 2: The paradox of the derivative
   - Chapter 3: Power Rule through geometry
   - Chapter 4: Trig Derivatives through geometry
   - Chapter 5: Visualizing the chain rule and product rule
   - Chapter 6: What's so special about Euler's number e?
   - Chapter 7: Implicit differentiation, what's going on here?
   - Chapter 8: Limits and the definition of derivatives
   - Chapter 9: (ε, δ) "epsilon delta" definitions of limits
   - Chapter 10: L'Hôpital's rule

- Neural Networks:

    - Chapter 1: But what is a Neural Network?
        - (The interactive part here is actually very fun to play with)
   - Chapter 2: Gradient descent, how neural networks learn
   - Chapter 3: Analyzing our neural network
   - Chapter 4: What is backpropagation really doing?
   - Chapter 5: Backpropagation calculus

- e^(iπ) using dynamics

- The hardest problem on the hardest test

- The unexpectedly hard windmill question (2011 IMO, Q2)

- Why do prime numbers make these spirals?

- Colliding blocks computing pi

    - Preview
   - Solution 1
   - Solution 2

- But why is a sphere's surface area four times its shadow?

- Visualizing the Riemann zeta function and analytic continuation

- Who cares about topology? (Inscribed rectangle problem)

- But how does bitcoin actually work?

- How secure is 256 bit security?

- Some light quantum mechanics (with minutephysics)

- Bayes' theorem

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Undoubtedly there are still a few lingering bugs, so do let me know if you find any. If you have a moment, take a look at one or two posts on topics you're curious to learn more about (or to review), and let us know your thoughts. And if there's anyone you know you think might enjoy lessons in this form, consider sharing it with them.

Working with the interns to get these out ended up being quite fun and rewarding. I was repeatedly impressed with the care and talent they put. It's one of those tasks which may feel a little rote at first glance (how hard can it be?), but I think it can make a huge difference when someone takes the initiative to really tailor the content to the a new medium. Things like well-chosen comprehension questions, or the live transaction tracker on the bitcoin article, or finely crafted vector graphics, and many other little touches all added up to result in something I feel very happy with.

-Grant

Comments

The new site looks awesome, great work 👍 Any plans/interest in localizing it? Having it in a few languages with a large number of speakers and low English proficiency would be beneficial, and I wonder if that can be streamlined and outsourced, now that the hard work of translating it into the text medium has already been done.

Sergey K

We can certainly do that, stay tuned...

3blue1brown

Thanks for the catch, I'll update that now!

3blue1brown

Looks wonderful! But I'd also like to request rss/atom feeds at least for the blog-portion of the site and ideally also for new lessons, if that's possible. A newsletter doesn't replace that.

in the quantum mechanics of light page, the question about the phase to change a cos to sin accepts the wrong answer although the description for the answer is correct. [the "notice a mistake? Submit a correction on github" requires a github login.]

William Smith

Oh, strange that wasn’t caught. The ideal way is to submit a pr or issue from the link at the bottom of the article. Shy of that, a note like this is perfect.

3blue1brown

This is why it’s nice to have more devices test things. I’ll take a look at that.

3blue1brown

Holy Brilliant Dot Org this is so good. Also reminds me of Dan & Maggie’s just-launched JS approach: https://justjavascript.com/

Jacob Ford

Your written material is superb. I’ve only two nits: In ‘Unraveling rings’, “us learning” should be “our learning”. https://www.quickanddirtytips.com/education/grammar/do-i-hate-your-singing-or-you-singing?page=1 In 'Fundamental Theorem', "it’s derivative" should be "its derivative". https://www.quickanddirtytips.com/education/grammar/apostrophe-catastrophe-part-one

Jeff Straathof

Its amazing to have the written lessons by the way!

What is the ideal way to submit feedback? I am three paragraphs into the ‘calculus 1’ lesson, and there are a couple of sentences that could use a comma, and it says ‘videa’ instead of ‘video’ in the first pop-up asterisk.

Looks great! Really handy to be able to look at small parts of the video again I’d forgotten, without having to skip through the video :).

But of course!

Dragi Raos

Awesome! Great job!

https://github.com/3b1b/3Blue1Brown.com

These are awesome! Are there any plans to open-source any of the web code for these? If not, I'd be interested to at least know what software/libraries were used to build the articles, or specifically the awesome standalone components like the interactive neural network or the live bitcoin transaction counter.

Andrew Alvarez

The links in the "Neural Networks" topic don't work: https://www.3blue1brown.com/topics/neural-networks

Does the site support RSS?

Will Harmon

The mobile site doesn't work well on wider screened devices (eg. Samsung Fold 2), to the point where it's unusable. Everything is cropped to the left, and very small (possibly because of the pi character video mentioned above, that's the only thing that fits the screen)

Will Harmon

In landscape mode it looks good tho

Steve Chantry-Taylor

It doesn't render well in Firefox on my S10+. Looks like the pi character video is too wide making the rest of the page only about 40% of the width

Steve Chantry-Taylor


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