Peter Todd [ARCHIVE] on Nostr: 📅 Original date posted:2017-05-27 📝 Original message:On Mon, May 22, 2017 at ...

📅 Original date posted:2017-05-27
📝 Original message:On Mon, May 22, 2017 at 06:32:38PM -0400, Russell O'Connor wrote:
> On May 22, 2017 23:05, "Peter Todd" <pete at petertodd.org> wrote:
>
> On Mon, May 22, 2017 at 03:05:49AM -0400, Russell O'Connor via bitcoin-dev
> wrote:
> > MerkleRoot := SHA256(SHA256(LeftRoot ⋅ RightRoot))
> > sha256Compress : Word256 × Word512 -> Word256
>
> To be clear, what math operations do you mean by "⋅" and "×"?
>
>
> By "⋅", I usually mean concatenation (though I also use it for function
> composition in one instance). By "×", I mean the Cartesian product.

Cartesian product can mean a lot of things.

What specifically do you mean by "cartesian product" here?

--
https://petertodd.org 'peter'[:-1]@petertodd.org
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