Pokemon Blue: ZZAZZ trainer $FC executing arbitrary code

Pokemon Blue: ZZAZZ trainer $FC executing arbitrary code

The ZZAZZ trainer with id $FC has an interesting property – it will execute code from $FA60, which is in the middle of Daycare Pokemon data. If the player had never deposited any Pokemon into Daycare, the execution will slide to $FA80 – the Pokemon box. I used the standard Mew/Ditto Glitch to encounter the […]

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But what is the Fourier Transform? A visual introduction.

But what is the Fourier Transform?  A visual introduction.

This right here is what we’re going to build to, this video:A certain animated approach to thinking about a super-important idea from math:The Fourier transform.For anyone unfamiliar with what that is,my #1 goal here is just for the video to be an introduction to that topic.But even for those of you who are already familiar […]

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The Wallis product for pi, proved geometrically

The Wallis product for pi, proved geometrically

All right, I think you’re gonna like this.I want to show you a beautiful result that reveals a surprising connection between a simple series of fractions and the geometry of circles.But unlike some other results like this that you may have seen before,this one involves multiplying things instead of adding them up.Now the video you’re […]

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How secure is 256 bit security?

How secure is 256 bit security?

In the main video on cryptocurrencies,I made two references to situations where, in order to break a given piece of security, you would have to guess a specific string of256 bits. One of these was in the context of digital signatures and the other in the context of a cryptographic hash function.For example, if you […]

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But how does bitcoin actually work?

But how does bitcoin actually work?

What does it mean to have a bitcoin?Many people have now heard of bitcoin, that’s it’s a fully digital currency, with no governmentto issue it and no banks needed to manage accounts and verify transactions.That no one actually knows who invented it.Yet many people don’t know the answer to this question, at least not in […]

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