What is outside of the universe

Nothing cannot exist, so nothing cannot be outside the universe? Just because the universe expands, doesn't mean it's endless. What's outside of the universe. God maybe? There's always something, there's never nothing. Nothing is something. Nothing doesn't exist.

Nothing Ø = { } is absolutely Mutual Exclusive Something X this can be conclusive proven using Cantorean Set Theory. So Nothing cannot possibly exist outside of the universe.

But is there an outside?

You think so but this is an assumption of your normal experience within your small space on Earth.
Let's consider space for a moment to see if we can come to a few conclusive clues and then take those clues to draw to a conclusion.

Is it reasonable or even rational to think that at the edge of is this brickwall with a sign no less that reads: “Turn around right now you’ve come to the end of space!” would that be reasonable?
Of course not but it is no different than saying that space has an edge at all, you would only be changing what kind of wall and oh yah, maybe the sign but it would all be the samething right?
Lets say space is infinite then since then you would be building a fuzzy wall and you wouldn’t be able to see that sign : )

Now using Set Builder Notation space would be:

S = { (x, y,z) : r² = x ² + y ² + z ²}

And nothing would be:

Ø = { }

That makes them very different from one another:

S ≠ Ø

Now let’s go one more step futher by asking ourselves if it reasonable to say that space is the same everywhere: is that reasonable?

We come up a few conclusive facts about space itself.

Now let’s see if space must have no edge or no outside then must be “Finite Yet Unbounded; Einstein” in such way that an egde or boundary or outside is excluded.

Well after you get tired of twisting space to do that you might realize that time was radius and space was spherical surface then would the space you were looking for.