In Unit 2 we introduced procedures.

The other thing we talked about in Unit 4 was how networks work.

In Unit 5 the main new idea we introduced was how to measure cost.

So we fill our cognitive maps with these markers of meaning.

The main new thing in Unit 3 was lists.

And then we introduced the hash table.

We can use a name to refer to some value.

And so, in fact, what we've done is we, humanity, have started abstracting out.

I go to the concept of The Lion King and I say, What is the essence of it?

And something very interesting is going on.

Evans

We've seen lots and lots of examples of abstraction in this class.

I wish to get to this point up here.

And what's neat about mathematics, and what's neat about algebra in particular is we can focus on this abstraction. we can focus on the abstract here, we can manipulate the abstract here, and what we discover from these ideas, from these manipulations can then go and be reapplied to all of these other applications, to all of them.

I'll address the planning problem at multiple levels of abstraction.

And, then, when you have to draw it, that requires you to take an extra level of abstraction and figure out,

I'm going to formally tell you how to do that.

So let me stretch out that equation.

Let's just say, for the sake of argument, this is 1995.

You have mechanical systems.

So the nth term, if this is, you know, if this is 10, it's going to be 1 plus 10 5's.

You're not even capable of thinking in abstractions.

Everything's going to be greater than or equal to 15.

And indeed, this kind of verbiage is not the exception, but the rule.

Then one last one. f of z.

Now, another kind of mind is the pattern thinker.

These are themes that aren't just pervasive throughout this course but are pervasive throughout all computer science.

This is a blue field it's actually an Yves Klein painting.

We recognize them by the experiences and we abstract them into symbols.

I can lump the bets into small, medium, and large.

One of the key problems is that these robots have to decide what to do next.

Well, we can go back to what we said before.

The first one is abstraction.

Abstract art is something to feel.

It must have been about an hour after this that the front door bell rang.

Now, All Shook Up is a great love song.

It's a Boolean logical distinction rather than on this side a probabilistic distinction.

That way, it makes it much easier to check if new statements invalidate a cached response.

Or in this case, it's not 5.

That's a little abstract. What's the target?

Abstraction is all about hiding details.

I noticed that Units 3 and 4 were quite abstract.

learned from this.

' osity' is an abstract noun word ending created from the ending of an ' ous' adjective.

That was difficult material.