# Symbols:Greek/Psi

## Psi

The $23$rd letter of the Greek alphabet.

- Minuscule: $\psi$

- Majuscule: $\Psi$

The $\LaTeX$ code for \(\psi\) is `\psi`

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The $\LaTeX$ code for \(\Psi\) is `\Psi`

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### Mapping

- $\psi \left({x}\right)$

The Greek letter $\psi$, along with $\phi$ and $\chi$ and others, is often used to denote a general mapping.

In the context of abstract algebra, it often denotes a homomorphism.

The $\LaTeX$ code for \(\psi \left({x}\right)\) is `\psi \left({x}\right)`

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