Welcome to the official HLT1 training.

I would now like to ask you all to scan the QR code.

If you have done all of this

then I will now start the live voting for you.

You should now have 90 seconds to answer the three questions.

There can be multiple options

but there can also be no choice.

Try your best.

Should you be able to press on?

If I can't, then I'll do it.

Great.

I'll give you another 30 seconds.

And the last one.

The third question.

The first question was

which half-leaders classes are there?

I see mixed answers.

I'll ask everyone who said there are quaternary half-leaders.

None?

9% of you said that.

5 connection half-leaders

elementary half-leaders

only 33%.

Either something is wrong with the survey, I hope.

I'll look further.

I think every answer that one person sent is considered an own voice.

Oh god, yes, that shouldn't happen.

Okay, let's do this, let's do it differently.

I'll see next time that the voting works correctly.

That's rather unusual.

Who is in the opinion that there are quaternary half-leaders?

No one?

Okay, so there are quaternary half-leaders.

The half-leaders

you've already seen the folio from the lecture.

We have connections from three different half-leaders.

We can also expand the whole thing to four.

That's not a problem in the actual sense.

In the practical sense

it's difficult to assign four different types of atoms in one crystal

to form a really decent half-leader.

But there is, this answer is correct.

The next one was 2,5 connection half-leaders.

Does anyone want to tell me why you think there are no 2

5 connection half-leaders?

Does anyone have an idea?

Yes?

Does anyone have an idea how to implement this?

Because I can also say that there are two, right?