Marcus Hutter

So the NLP community develops new systems and then they measure the compression length and then they have ranking and leaks because there's a strong correlation between compressing well and then the systems performing well at the task at hand.

It's not perfect, but it's good enough for them as an intermediate aim.

What it stands for, actually, that's probably the more basic question.

The first question is usually how it's pronounced, but finally I put it on the website how it's pronounced, and you figured it out.

The name comes from AI, artificial intelligence, and the X, I, is the Greek letter XI, which are used for Solomonov's distribution.

for quite stupid reasons, which I'm not willing to repeat here in front of camera.

So it just happened to be more or less arbitrary.

I chose the xi.

But it also has nice other interpretations.

So there are actions and perceptions in this model.

An agent has actions and perceptions over time.

So this is a index i, x index i. So there's the action at time i and then followed by perception at time i.

We'll go with that.

I'll edit out the first part.

I'm just kidding.

I have some more interpretations.

So at some point, maybe five years ago or 10 years ago, I discovered in Barcelona, it was on a big church.

There was in stone engraved some text

And the word Aixi appeared there a couple of times.

I was very surprised and happy about it.