## FANDOM

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The Extended Universe Size Index (EUSI) is a number, which indicates the deepest nestation of other verses within a specific verse.

It can be used to tell the size of a universe, without needing to say its size, due to most verses having beyond infinite sizes, or ordinals/cardinals that aren't named yet.

## Definition

We define a function $\psi(\alpha) = \alpha + 1$, now we extend it to

$\psi(\alpha,\beta,\gamma \cdots \delta) = \beta \to \psi(\alpha-1,\beta,\gamma \cdots \delta)$ fixed point.

$\psi(0,\beta,\gamma \cdots \delta) = \psi(\beta,\gamma \cdots \delta)$

$\psi(0,0,\gamma \cdots \delta) = \psi(1,\gamma \cdots \delta)$

## Examples

• Protoverse = $0$
• The Universe = $\psi(1)$
• Berryverse = $\psi(1,0)$
• The Omniverse = $\psi(2,0)$
• The Box = $\psi(\omega,0)$
• Megaberryverse = $\psi(\mu,0)$ where $\mu$ is arbitrarily $\mu > \omega$
• Eye on The Wall - $\psi(1,0,0)$
• Absoverse = $\psi(1,0,0)$
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